# 1915 U.S. National Championships – Men's singles

William Johnston defeated Maurice McLoughlin 1–6, 6–0, 7–5, 10–8 in the final to win the men's singles tennis title at the 1915 U.S. National Championships. The event was held at the West Side Tennis Club in Forest Hills, New York in the United States.

## Draw
### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| Clarence Griffin | 2 | 1 | 8 | 7 | 1 | | | | | | | | | | | |
| William Johnston | 6 | 6 | 6 | 5 | 6 | | | | | | | | | | | |
| William Johnston | 6 | 6 | 6 | 5 | 6 | William Johnston | 5 | 6 | 5 | 6 | 6 | | | | | |
| | | | | | | R. Norris Williams | 7 | 4 | 7 | 2 | 2 | | | | | |
| R. Norris Williams | 8 | 7 | 6 | | | R. Norris Williams | 7 | 4 | 7 | 2 | 2 | | | | | |
| William Rand | 6 | 5 | 1 | | | | | | | | | | | | | |
| William Rand | 6 | 5 | 1 | | | | | | | | | William Johnston | 1 | 6 | 7 | 10 |
| | | | | | | | | | | | | Maurice McLoughlin | 6 | 0 | 5 | 8 |
| Frank Hunter | 2 | 4 | 0 | | | | | | | | | | | | | | Maurice McLoughlin | 6 | 0 | 5 | 8 |
| Maurice McLoughlin | 6 | 6 | 6 | | | | | | | | | | | | | |
| Maurice McLoughlin | 6 | 6 | 6 | | | Maurice McLoughlin | 6 | 6 | 7 | | | | | | | |
| | | | | | | Theodore Pell | 2 | 0 | 5 | | | | | | | |
| Irving Wright | 3 | 1 | 1 | | | Theodore Pell | 2 | 0 | 5 | | | | | | | |
| Theodore Pell | 6 | 6 | 6 | | | | | | | | | | | | | |

### Earlier rounds
#### Section 1

| First round | First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round |
| Graves | Graves | 6 | 6 | 6 | | | | | | | | | | | | | | | | | | | | |
| Johnson | Johnson | 3 | 4 | 4 | | | Graves | Graves | 2 | 6 | 8 | | | | | | | | | | | | | |
| McKay | McKay | 3 | 6 | 6 | 2 | 1 | Dawson | Dawson | 6 | 8 | 10 | | | | | | | | | | | | | |
| Dawson | Dawson | 6 | 2 | 4 | 6 | 6 | | | | | | | Dawson | Dawson | 3 | 5 | 2 | | | | | | | |
| Cunningham | Cunningham | 3 | 6 | 5 | 3 | | | | | | | | Griffin | Griffin | 6 | 7 | 6 | | | | | | | |
| Garland | Garland | 6 | 3 | 7 | 6 | | Garland | Garland | 3 | 6 | 2 | 3 | | | | | | | | | | | | |
| Griffin | Griffin | 6 | 6 | 6 | | | Griffin | Griffin | 6 | 2 | 6 | 6 | | | | | | | | | | | | |
| Thayer | Thayer | 2 | 2 | 1 | | | | | | | | | | | | | | | | Griffin | Griffin | 6 | 6 | 6 |
| Wightman | Wightman | 3 | 1 | 7 | 4 | | | | | | | | | | | | | | | Law | Law | 2 | 4 | 2 |
| MacMullen | MacMullen | 6 | 6 | 5 | 6 | | Wightman | Wightman | 6 | 6 | 6 | | | | | | | | | | | | | |
| Cady | Cady | 3 | 4 | 6 | 6 | | Toland | Toland | 3 | 1 | 1 | | | | | | | | | | | | | |
| Toland | Toland | 6 | 6 | 2 | 8 | | | | | | | | Wightman | Wightman | 7 | 6 | 4 | 5 | 4 | | | | | |
| O'Neale | O'Neale | 9 | 6 | 6 | | | | | | | | | Law | Law | 5 | 2 | 6 | 7 | 6 | | | | | |
| Blair | Blair | 7 | 2 | 2 | | | O'Neale | O'Neale | 6 | 2 | 4 | 4 | | | | | | | | | | | | |
| Major | Major | 6 | 2 | 4 | 5 | | Law | Law | 4 | 6 | 6 | 6 | | | | | | | | | | | | |
| Law | Law | 4 | 6 | 6 | 7 | | | | | | | | | | | | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round |
| Man | Man | 6 | 6 | 6 | 6 | 2 | | | | | | | | | | | | | | | | | |
| Watters | Watters | 4 | 1 | 8 | 8 | 6 | Watters | Watters | 6 | 6 | 6 | | | | | | | | | | | | |
| Anderson | Anderson | 4 | 0 | 6 | | | Talland | Talland | 1 | 2 | 4 | | | | | | | | | | | | |
| Talland | Talland | 6 | 6 | 8 | | | | | | | | Watters | Watters | 2 | 1 | 2 | | | | | | | |
| Hackett | Hackett | 1 | 2 | 8 | | | | | | | | Johnston | Johnston | 6 | 6 | 6 | | | | | | | |
| Johnston | Johnston | 6 | 6 | 10 | | | Johnston | Johnston | 8 | 6 | 6 | | | | | | | | | | | | |
| Pell | Pell | 6 | 9 | 9 | | | Pell | Pell | 6 | 4 | 4 | | | | | | | | | | | | |
| Turnbull | Turnbull | 1 | 7 | 7 | | | | | | | | | | | | | | Johnston | Johnston | 3 | 6 | 6 | 7 |
| Martin | Martin | 1 | 3 | 6 | | | | | | | | | | | | | | Behr | Behr | 6 | 3 | 2 | 5 |
| Behr | Behr | 6 | 6 | 8 | | | Behr | Behr | 6 | 6 | 6 | | | | | | | | | | | | |
| Bowman | Bowman | 2 | 4 | 0 | | | Phillips | Phillips | 0 | 3 | 4 | | | | | | | | | | | | |
| Phillips | Phillips | 6 | 6 | 6 | | | | | | | | Behr | Behr | 4 | 6 | 6 | 6 | | | | | | |
| Parker | Parker | 6 | 4 | 6 | 6 | | | | | | | LeRoy | LeRoy | 6 | 4 | 4 | 4 | | | | | | |
| Chambers | Chambers | 3 | 6 | 2 | 3 | | Parker | Parker | 2 | 4 | 8 | | | | | | | | | | | | |
| Rosenbaum | Rosenbaum | 5 | 3 | 0 | | | LeRoy | LeRoy | 6 | 6 | 10 | | | | | | | | | | | | |
| LeRoy | LeRoy | 7 | 6 | 6 | | | | | | | | | | | | | | | | | | | |

#### Section 3

| First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round |
| Palmer | Palmer | 2 | 3 | 1 | | | | | | | | | | | | | | | | | | | |
| Thomas | Thomas | 6 | 6 | 6 | | Thomas | Thomas | 3 | 6 | 6 | 6 | | | | | | | | | | | | |
| Eaton | Eaton | 4 | 7 | 0 | 4 | Copeland | Copeland | 6 | 2 | 4 | 3 | | | | | | | | | | | | |
| Copeland | Copeland | 6 | 5 | 6 | 6 | | | | | | | | Thomas | Thomas | 2 | 5 | 4 | | | | | | |
| Adoue | Adoue | 3 | 6 | 6 | 6 | | | | | | | | Adoue | Adoue | 6 | 7 | 6 | | | | | | |
| Brinsmade | Brinsmade | 6 | 2 | 3 | 1 | Adoue | Adoue | 6 | 1 | 6 | 2 | 7 | | | | | | | | | | | |
| Stevens | Stevens | 6 | 3 | 6 | 6 | Stevens | Stevens | 3 | 6 | 4 | 6 | 5 | | | | | | | | | | | |
| Kidder | Kidder | 4 | 6 | 2 | 3 | | | | | | | | | | | | | | Adoue | Adoue | 3 | 1 | 0 |
| Inman | Inman | 7 | 6 | 6 | | | | | | | | | | | | | | | Williams | Williams | 6 | 6 | 6 |
| Childs | Childs | 5 | 2 | 3 | | Inman | Inman | 5 | 1 | 7 | | | | | | | | | | | | | |
| Riker | Riker | w/ | o | | | Williams | Williams | 7 | 6 | 9 | | | | | | | | | | | | | |
| Williams | Williams | | | | | | | | | | | | Williams | Williams | 6 | 9 | 2 | 6 | | | | | |
| Johnson | Johnson | 6 | 6 | 6 | | | | | | | | | Hall | Hall | 3 | 7 | 6 | 1 | | | | | |
| Hooker | Hooker | 0 | 1 | 1 | | Johnson | Johnson | 16 | 6 | 2 | 6 | 2 | | | | | | | | | | | |
| Hall | Hall | 6 | 0 | 6 | 6 | Hall | Hall | 18 | 4 | 6 | 4 | 6 | | | | | | | | | | | |
| Burrows | Burrows | 2 | 6 | 1 | 2 | | | | | | | | | | | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round |
| Forster | Forster | 2 | 3 | 2 | | | | | | | | | | | | | | | | | | | |
| Biddle | Biddle | 6 | 6 | 6 | | | Biddle | Biddle | 6 | 6 | 6 | | | | | | | | | | | | |
| Rand | Rand | 3 | 2 | 2 | | | Peaslee | Peaslee | 2 | 1 | 0 | | | | | | | | | | | | |
| Peaslee | Peaslee | 6 | 6 | 6 | | | | | | | | Biddle | Biddle | 6 | 6 | 6 | | | | | | | |
| Knox | Knox | 6 | 4 | 6 | 6 | | | | | | | Grinnell | Grinnell | 1 | 2 | 2 | | | | | | | |
| Geary | Geary | 4 | 6 | 4 | 2 | | Knox | Knox | 5 | 2 | 1 | | | | | | | | | | | | |
| Grinnell | Grinnell | 6 | 6 | 6 | | | Grinnell | Grinnell | 7 | 6 | 6 | | | | | | | | | | | | |
| Robinson | Robinson | 2 | 2 | 2 | | | | | | | | | | | | | Biddle | Biddle | 6 | 3 | 3 | 6 | 3 |
| Blackstone | Blackstone | 7 | 4 | 7 | 6 | | | | | | | | | | | | Rand | Rand | 3 | 6 | 6 | 2 | 6 |
| Fall | Fall | 5 | 6 | 5 | 1 | | Blackstone | Blackstone | 1 | 1 | 4 | | | | | | | | | | | | |
| Pate | Pate | 3 | 6 | 7 | 6 | | Pate | Pate | 6 | 6 | 6 | | | | | | | | | | | | |
| Drake | Drake | 6 | 3 | 5 | 2 | | | | | | | Pate | Pate | 1 | 4 | 1 | | | | | | | |
| Thomas | Thomas | 0 | 9 | 1 | 7 | 4 | | | | | | Rand | Rand | 6 | 6 | 6 | | | | | | | |
| Rand | Rand | 6 | 7 | 6 | 5 | 6 | Rand | Rand | 6 | 6 | 6 | | | | | | | | | | | | |
| Plitt | Plitt | 6 | 6 | 6 | | | Plitt | Plitt | 0 | 0 | 2 | | | | | | | | | | | | |
| Da Silva | Da Silva | 1 | 0 | 2 | | | | | | | | | | | | | | | | | | | |

#### Section 5

| First round | First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round |
| Henshaw | Henshaw | 4 | 1 | 1 | | | | | | | | | | | | | | | | | | | | | | | |
| Anderson | Anderson | 6 | 6 | 6 | | | Anderson | Anderson | 5 | 6 | 6 | 1 | 1 | | | | | | | | | | | | | | |
| Hunter | Hunter | 6 | 6 | 6 | | | Hunter | Hunter | 7 | 4 | 4 | 6 | 6 | | | | | | | | | | | | | | |
| Sargeant | Sargeant | 3 | 2 | 2 | | | | | | | | | | Hunter | Hunter | 10 | 6 | 2 | 2 | 6 | | | | | | | |
| Dionne | Dionne | 7 | 6 | 11 | | | | | | | | | | Dionne | Dionne | 8 | 3 | 6 | 6 | 3 | | | | | | | |
| De Camp | De Camp | 5 | 2 | 9 | | | Dionne | Dionne | 6 | 6 | 6 | | | | | | | | | | | | | | | | |
| Vaile | Vaile | 2 | 6 | 7 | 6 | | Vaile | Vaile | 3 | 0 | 2 | | | | | | | | | | | | | | | | |
| McAllister | McAllister | 6 | 4 | 5 | 4 | | | | | | | | | | | | | | | | Hunter | Hunter | 3 | 6 | 6 | 2 | 6 |
| Cole | Cole | w/ | o | | | | | | | | | | | | | | | | | | Pfaffman | Pfaffman | 6 | 3 | 3 | 6 | 3 |
| Post | Post | | | | | | Post | Post | 3 | 0 | 0 | | | | | | | | | | | | | | | | |
| Brown | Brown | 3 | 6 | 0 | 2 | | Pfaffman | Pfaffman | 6 | 6 | 6 | | | | | | | | | | | | | | | | |
| Pfaffman | Pfaffman | 6 | 3 | 6 | 6 | | | | | | | | | Pfaffman | Pfaffman | 7 | 6 | 6 | | | | | | | | | |
| Campbell | Campbell | 6 | 6 | 7 | | | | | | | | | | Campbell | Campbell | 5 | 4 | 1 | | | | | | | | | |
| Doubleday | Doubleday | 3 | 2 | 5 | | | Campbell | Campbell | 7 | 6 | 3 | 6 | | | | | | | | | | | | | | | |
| Allen | Allen | 7 | 6 | 5 | 6 | 7 | Allen | Allen | 5 | 3 | 6 | 2 | | | | | | | | | | | | | | | |
| Gibbons | Gibbons | 9 | 1 | 7 | 0 | 5 | | | | | | | | | | | | | | | | | | | | | |

#### Section 6

| First round | First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round |
| Stoddart | Stoddart | 6 | 3 | 7 | 6 | | | | | | | | | | | | | | | | | | |
| Wood | Wood | 3 | 6 | 5 | 1 | | Wood | Wood | 1 | 1 | 2 | | | | | | | | | | | | |
| Allen | Allen | w/ | o | | | | Beekman | Beekman | 6 | 6 | 6 | | | | | | | | | | | | |
| Beekman | Beekman | | | | | | | | | | | Beekman | Beekman | 2 | 6 | 2 | 2 | | | | | | |
| Roberts | Roberts | 1 | 5 | 0 | | | | | | | | McLoughlin | McLoughlin | 6 | 3 | 6 | 6 | | | | | | |
| Mathey | Mathey | 6 | 7 | 6 | | | Mathey | Mathey | 1 | 2 | 6 | | | | | | | | | | | | |
| Kuhn | Kuhn | 1 | 1 | 0 | | | McLoughlin | McLoughlin | 6 | 6 | 8 | | | | | | | | | | | | |
| McLoughlin | McLoughlin | 6 | 6 | 6 | | | | | | | | | | | | | | McLoughlin | McLoughlin | 6 | 6 | 1 | 6 |
| Cragin | Cragin | 6 | 8 | 6 | | | | | | | | | | | | | | Alexander | Alexander | 3 | 2 | 6 | 3 |
| Johnston | Johnston | 8 | 10 | 8 | | | Johnston | Johnston | 2 | 6 | 2 | | | | | | | | | | | | |
| Voshell | Voshell | 6 | 6 | 6 | | | Voshell | Voshell | 6 | 8 | 6 | | | | | | | | | | | | |
| McClave | McClave | 3 | 4 | 2 | | | | | | | | Voshell | Voshell | 4 | 4 | 2 | | | | | | | |
| Roberts | Roberts | 3 | 6 | 4 | 6 | 4 | | | | | | Alexander | Alexander | 6 | 6 | 6 | | | | | | | |
| Roberts | Roberts | 6 | 0 | 6 | 4 | 6 | Roberts | Roberts | 4 | 1 | 1 | | | | | | | | | | | | |
| Niles | Niles | 3 | 7 | 5 | 10 | 2 | Alexander | Alexander | 6 | 6 | 6 | | | | | | | | | | | | |
| Alexander | Alexander | 6 | 5 | 7 | 8 | 6 | | | | | | | | | | | | | | | | | |

#### Section 7

| First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round |
| Prentice | Prentice | 6 | 6 | 6 | | | | | | | | | | | | | | | | | | | |
| Bourne | Bourne | 0 | 3 | 0 | | Prentice | Prentice | 6 | 7 | 7 | 6 | | | | | | | | | | | | |
| Coffey | Coffey | 6 | 6 | 6 | | Coffey | Coffey | 8 | 5 | 5 | 1 | | | | | | | | | | | | |
| Swain | Swain | 4 | 4 | 1 | | | | | | | | | Prentice | Prentice | 6 | 6 | 5 | 6 | | | | | |
| Baggs | Baggs | 6 | 6 | 6 | | | | | | | | | Phillips | Phillips | 0 | 3 | 7 | 0 | | | | | |
| Boocock | Boocock | 0 | 1 | 2 | | Baggs | Baggs | 9 | 2 | 6 | 4 | 0 | | | | | | | | | | | |
| Andrews | Andrews | 3 | 2 | 3 | | Phillips | Phillips | 7 | 6 | 4 | 6 | 6 | | | | | | | | | | | |
| Phillips | Phillips | 6 | 6 | 6 | | | | | | | | | | | | | | | Prentice | Prentice | 5 | 4 | 1 |
| Sommer | Sommer | 0 | 0 | 0 | | | | | | | | | | | | | | | Wright | Wright | 7 | 6 | 6 |
| Wright | Wright | 6 | 6 | 6 | | Wright | Wright | 6 | 0 | 6 | 6 | | | | | | | | | | | | |
| Cushman | Cushman | 2 | 2 | 1 | | Caner | Caner | 2 | 6 | 1 | 3 | | | | | | | | | | | | |
| Caner | Caner | 6 | 6 | 6 | | | | | | | | | Wright | Wright | 6 | 6 | 6 | | | | | | |
| Frelinghuysen | Frelinghuysen | 6 | 6 | 8 | | | | | | | | | Frelinghuysen | Frelinghuysen | 3 | 2 | 0 | | | | | | |
| Thomas | Thomas | 2 | 1 | 6 | | Frelinghuysen | Frelinghuysen | 3 | 6 | 9 | 4 | 6 | | | | | | | | | | | |
| Riker | Riker | 5 | 1 | 6 | 5 | Harvey | Harvey | 6 | 1 | 7 | 6 | 4 | | | | | | | | | | | |
| Harvey | Harvey | 7 | 6 | 4 | 7 | | | | | | | | | | | | | | | | | | |

#### Section 8

| First round | First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Third round | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round |
| Whitney | Whitney | 6 | 4 | 6 | 6 | | | | | | | | | | | | | | | | | |
| Throckmorton | Throckmorton | 3 | 6 | 4 | 1 | Whitney | Whitney | 3 | 4 | 6 | 3 | | | | | | | | | | | |
| Pell | Pell | 6 | 6 | 6 | | Pell | Pell | 6 | 6 | 0 | 6 | | | | | | | | | | | |
| Fox | Fox | 2 | 0 | 2 | | | | | | | | Pell | Pell | 6 | 6 | 6 | | | | | | |
| Newhouse | Newhouse | 0 | 2 | 4 | | | | | | | | Washburn | Washburn | 4 | 4 | 3 | | | | | | |
| Washburn | Washburn | 6 | 6 | 6 | | Washburn | Washburn | 7 | 9 | 6 | 6 | | | | | | | | | | | |
| McKenzie | McKenzie | 1 | 0 | 2 | | Church | Church | 5 | 11 | 4 | 2 | | | | | | | | | | | |
| Church | Church | 6 | 6 | 6 | | | | | | | | | | | | | | Pell | Pell | 6 | 6 | 6 |
| Nettleton | Nettleton | 4 | 9 | 2 | 5 | | | | | | | | | | | | | Bull | Bull | 1 | 2 | 3 |
| Bassford | Bassford | 6 | 7 | 6 | 7 | Bassford | Bassford | 6 | 4 | 4 | 2 | | | | | | | | | | | |
| Bull | Bull | 4 | 12 | 6 | 6 | Bull | Bull | 4 | 6 | 6 | 6 | | | | | | | | | | | |
| Mahan | Mahan | 6 | 10 | 2 | 4 | | | | | | | Bull | Bull | 8 | 7 | 5 | 6 | | | | | |
| VanDeventer | VanDeventer | 4 | 3 | 2 | | | | | | | | Harris | Harris | 6 | 5 | 7 | 2 | | | | | |
| Plummer | Plummer | 6 | 6 | 6 | | Plummer | Plummer | 1 | 1 | 1 | | | | | | | | | | | | |
| Harris | Harris | 6 | 6 | 6 | | Harris | Harris | 6 | 6 | 6 | | | | | | | | | | | | |
| Russell | Russell | 1 | 1 | 1 | | | | | | | | | | | | | | | | | | |