# 1900 U.S. National Championships – Men's singles

Two-time defending champion Malcolm Whitman defeated William Larned in the challenge round, 6–4, 1–6, 6–2, 6–2 to win the men's singles tennis title at the 1900 U.S. National Championships. The event was held at the Newport Casino in Newport, R.I., United States.
Larned had defeated George Wrenn in the All Comers' Final.

## Draw
### Challenge round

| Challenge Round | Challenge Round | Challenge Round | Challenge Round | Challenge Round | Challenge Round | Challenge Round |
| Malcolm Whitman | Malcolm Whitman | 6 | 1 | 6 | 6 | |
| William Larned | William Larned | 4 | 6 | 2 | 2 | |

### Final eight

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Finals | Finals | Finals | Finals | Finals |
| Dwight Davis | Dwight Davis | 6 | 6 | 6 | 3 | 2 | | | | | | | | | | | | |
| Beals Wright | Beals Wright | 4 | 4 | 8 | 6 | 6 | | | | | | | | | | | | |
| Beals Wright | Beals Wright | 4 | 4 | 8 | 6 | 6 | Beals Wright | Beals Wright | 9 | 6 | 6 | 3 | | | | | | |
| | | | | | | | William Larned | William Larned | 11 | 8 | 1 | 6 | | | | | | |
| Malcolm Chace | Malcolm Chace | 1 | 1 | 6 | 0 | | William Larned | William Larned | 11 | 8 | 1 | 6 | | | | | | |
| William Larned | William Larned | 6 | 6 | 4 | 6 | | | | | | | | | | | | | |
| William Larned | William Larned | 6 | 6 | 4 | 6 | | | | | | | | | William Larned | William Larned | 6 | 6 | 6 |
| | | | | | | | | | | | | | | George Wrenn | George Wrenn | 3 | 2 | 2 |
| Arthur Gore | Arthur Gore | 6 | 7 | 6 | | | | | | | | | | | | | | | George Wrenn | George Wrenn | 3 | 2 | 2 |
| Ernest Black | Ernest Black | 0 | 5 | 0 | | | | | | | | | | | | | | |
| Ernest Black | Ernest Black | 0 | 5 | 0 | | | Arthur Gore | Arthur Gore | 7 | 6 | 6 | 2 | 2 | | | | | |
| | | | | | | | George Wrenn | George Wrenn | 9 | 1 | 0 | 6 | 6 | | | | | |
| George Wrenn | George Wrenn | 6 | 6 | 6 | | | George Wrenn | George Wrenn | 9 | 1 | 0 | 6 | 6 | | | | | |
| Robert Wrenn | Robert Wrenn | 4 | 1 | 1 | | | | | | | | | | | | | | |

### Earlier rounds
#### Section 1

| 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 | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | | D Davis | D Davis | 6 | 6 | 6 | | | | | | | | | | | | | | |
| | | | | | | H Avery | H Avery | 0 | 3 | 1 | | | | | | | | | | | | | | |
| | | | | | | | | | | | D Davis | D Davis | 6 | 0 | 6 | 7 | | | | | | | | |
| | | | | | | | | | | | J Appleton Allen | J Appleton Allen | 4 | 6 | 4 | 5 | | | | | | | | |
| | | | | | | J Appleton Allen | J Appleton Allen | w/ | o | | | | | | | | | | | | | | | |
| | | | | | | LDT Quimby | LDT Quimby | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | D Davis | D Davis | 6 | 6 | 6 | 3 | 2 |
| K Horton | K Horton | 2 | 9 | 8 | 6 | | | | | | | | | | | | | BC Wright | BC Wright | 4 | 4 | 8 | 6 | 6 |
| RC Thomas | RC Thomas | 6 | 7 | 6 | 4 | K Horton | K Horton | 2 | 4 | 0 | | | | | | | | | | | | | | |
| K Collins | K Collins | 5 | 6 | 7 | 7 | K Collins | K Collins | 6 | 6 | 6 | | | | | | | | | | | | | | |
| J Parmly Paret | J Parmly Paret | 7 | 1 | 5 | 5 | | | | | | K Collins | K Collins | 3 | 6 | 6 | 3 | 4 | | | | | | | |
| LE Ware | LE Ware | 6 | 6 | 6 | | | | | | | BC Wright | BC Wright | 6 | 1 | 4 | 6 | 6 | | | | | | | |
| IC Wright | IC Wright | 2 | 4 | 2 | | LE Ware | LE Ware | 3 | 2 | 4 | | | | | | | | | | | | | | |
| BC Wright | BC Wright | 6 | 6 | 6 | | BC Wright | BC Wright | 6 | 6 | 6 | | | | | | | | | | | | | | |
| HE Foster | HE Foster | 1 | 1 | 2 | | | | | | | | | | | | | | | | | | | | |

#### 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 | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| GW Lee | GW Lee | 3 | 6 | 4 | 7 | 6 | | | | | | | | | | | | | | | | | | |
| GS Keyes | GS Keyes | 6 | 2 | 6 | 5 | 3 | GW Lee | GW Lee | 2 | 3 | 4 | | | | | | | | | | | | | |
| F Alexander | F Alexander | 6 | 6 | 6 | | | F Alexander | F Alexander | 6 | 6 | 6 | | | | | | | | | | | | | |
| C Schley | C Schley | 3 | 1 | 2 | | | | | | | | | | F Alexander | F Alexander | 2 | 3 | 2 | | | | | | |
| M Chace | M Chace | 6 | 6 | 0 | 6 | | | | | | | | | M Chace | M Chace | 6 | 6 | 6 | | | | | | |
| A Codman | A Codman | 0 | 1 | 6 | 2 | | M Chace | M Chace | 3 | 6 | 6 | 4 | 6 | | | | | | | | | | | |
| EP Fischer | EP Fischer | 2 | 7 | 6 | 6 | | EP Fischer | EP Fischer | 6 | 2 | 3 | 6 | 4 | | | | | | | | | | | |
| LH Waidner | LH Waidner | 6 | 5 | 4 | 3 | | | | | | | | | | | | | | M Chace | M Chace | 1 | 1 | 6 | 0 |
| S Hardy | S Hardy | w/ | o | | | | | | | | | | | | | | | | W Larned | W Larned | 6 | 6 | 4 | 6 |
| HH Hunnewell | HH Hunnewell | | | | | | S Hardy | S Hardy | w/ | o | | | | | | | | | | | | | | |
| SC Williams | SC Williams | w/ | o | | | | SC Williams | SC Williams | | | | | | | | | | | | | | | | |
| WA Warnock | WA Warnock | | | | | | | | | | | | | S Hardy | S Hardy | 1 | 1 | 3 | | | | | | |
| W Larned | W Larned | 6 | 6 | 6 | | | | | | | | | | W Larned | W Larned | 6 | 6 | 6 | | | | | | |
| RH Allen | RH Allen | 0 | 0 | 2 | | | W Larned | W Larned | 6 | 6 | 6 | | | | | | | | | | | | | |
| JD Pell | JD Pell | w/ | o | | | | JD Pell | JD Pell | 0 | 1 | 0 | | | | | | | | | | | | | |
| JC Davidson | JC Davidson | | | | | | | | | | | | | | | | | | | | | | | |

#### Section 3

| 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| HC Clews | HC Clews | w/ | o | | | | | | | | | | | | | | | | | | | | |
| R Peters | R Peters | | | | HC Clews | HC Clews | 0 | 0 | 0 | | | | | | | | | | | | | | |
| A Gore | A Gore | w/ | o | | A Gore | A Gore | 6 | 6 | 6 | | | | | | | | | | | | | | |
| HM Ashe | HM Ashe | | | | | | | | | | | A Gore | A Gore | 6 | 2 | 3 | 7 | 6 | | | | | |
| H Ward | H Ward | w/ | o | | | | | | | | | H Ward | H Ward | 1 | 6 | 6 | 5 | 3 | | | | | |
| HN Rawlins | HN Rawlins | | | | H Ward | H Ward | 6 | 6 | 7 | | | | | | | | | | | | | | |
| W Clothier | W Clothier | w/ | o | | W Clothier | W Clothier | 4 | 3 | 5 | | | | | | | | | | | | | | |
| C Angier | C Angier | | | | | | | | | | | | | | | | | | A Gore | A Gore | 6 | 7 | 6 |
| CR Budlong | CR Budlong | 6 | 6 | 6 | | | | | | | | | | | | | | | E Black | E Black | 0 | 5 | 0 |
| EA Taft | EA Taft | 0 | 0 | 2 | CR Budlong | CR Budlong | 6 | 6 | 6 | | | | | | | | | | | | | | |
| AF Fuller | AF Fuller | w/ | o | | AF Fuller | AF Fuller | 1 | 2 | 1 | | | | | | | | | | | | | | |
| E Stille | E Stille | | | | | | | | | | | CR Budlong | CR Budlong | 6 | 6 | 4 | 11 | 4 | | | | | |
| E Black | E Black | w/ | o | | | | | | | | | E Black | E Black | 8 | 2 | 6 | 6 | 6 | | | | | |
| H Thornton | H Thornton | | | | E Black | E Black | 6 | 3 | 6 | 3 | 6 | | | | | | | | | | | | |
| S Hardy | S Hardy | 6 | 7 | 6 | S Hardy | S Hardy | 2 | 6 | 3 | 6 | 2 | | | | | | | | | | | | |
| WE Putnam | WE Putnam | 2 | 5 | 2 | | | | | | | | | | | | | | | | | | | |

#### Section 4

| 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| H Hackett | H Hackett | 6 | 6 | 6 | | | | | | | | | | | | | | | | | |
| H Plummer | H Plummer | 4 | 0 | 4 | H Hackett | H Hackett | 1 | 6 | 7 | 4 | | | | | | | | | | | |
| GL Wrenn | GL Wrenn | w/ | o | | GL Wrenn | GL Wrenn | 6 | 4 | 9 | 6 | | | | | | | | | | | |
| W Friedman | W Friedman | | | | | | | | | | GL Wrenn | GL Wrenn | 1 | 6 | 6 | 6 | | | | | |
| J Ryerson | J Ryerson | 6 | 6 | 6 | | | | | | | RD Little | RD Little | 6 | 2 | 0 | 2 | | | | | |
| EP Kirkland | EP Kirkland | 1 | 2 | 3 | J Ryerson | J Ryerson | 0 | 1 | 6 | 2 | | | | | | | | | | | |
| | | | | | RD Little | RD Little | 6 | 6 | 3 | 6 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | GL Wrenn | GL Wrenn | 6 | 6 | 6 |
| | | | | | | | | | | | | | | | | | R Wrenn | R Wrenn | 4 | 1 | 4 |
| | | | | | D Miller | D Miller | | | | | | | | | | | | | | | |
| | | | | | H Stevens | H Stevens | w/ | o | | | | | | | | | | | | | |
| | | | | | | | | | | | H Stevens | H Stevens | 0 | 1 | 5 | | | | | | |
| | | | | | | | | | | | R Wrenn | R Wrenn | 6 | 6 | 7 | | | | | | |
| | | | | | R Wrenn | R Wrenn | 6 | 6 | 6 | | | | | | | | | | | | |
| | | | | | JR Carpenter | JR Carpenter | 3 | 0 | 1 | | | | | | | | | | | | |