# 1945 U.S. National Championships – Men's singles

Frank Parker defeated Bill Talbert 14–12, 6–1, 6–2 in the final to win the men's singles tennis title at the 1945 U.S. National Championships.

## Seeds

The seeded players are listed below. Frank Parker is the champion; others show the round in which they were eliminated.

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* r = Retired

### Finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Frank Parker | 6 | 6 | 6 | | | | | | | | | | | | |
| 7 | Seymour Greenberg | 2 | 3 | 2 | | | | | | | | | | | | |
| 7 | Seymour Greenberg | 2 | 3 | 2 | | | 1 | Frank Parker | 6 | 8 | 7 | | | | | |
| | | | | | | | 6 | Elwood Cooke | 1 | 6 | 5 | | | | | |
| | Sidney Wood | 12 | 5 | 4 | 6 | 0 | 6 | Elwood Cooke | 1 | 6 | 5 | | | | | |
| 6 | Elwood Cooke | 10 | 7 | 6 | 2 | 6 | | | | | | | | | | |
| 6 | Elwood Cooke | 10 | 7 | 6 | 2 | 6 | | | | | | 1 | Frank Parker | 14 | 6 | 6 |
| | | | | | | | | | | | | 2 | Bill Talbert | 12 | 1 | 2 |
| 2 | Bill Talbert | 6 | 6 | 9 | | | | | | | | | | | | | 2 | Bill Talbert | 12 | 1 | 2 |
| (3) | Alejo Russell | 1 | 2 | 7 | | | | | | | | | | | | |
| (3) | Alejo Russell | 1 | 2 | 7 | | | 2 | Bill Talbert | 7 | 6 | 6 | | | | | |
| | | | | | | | 3 | Pancho Segura | 5 | 3 | 4 | | | | | |
| 3 | Pancho Segura | 6 | 4 | 6 | 6 | | 3 | Pancho Segura | 5 | 3 | 4 | | | | | |
| 8 | Robert Falkenburg | 2 | 6 | 1 | 1 | | | | | | | | | | | |

### Earlier rounds
#### Section 1

| Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 1 | Parker | 6 | 6 | | | | | | | | | |
| | Ball | 1 | 2 | | | | | | | | | |
| | | | | 1 | Parker | 6 | 6 | | | | | |
| | | | | | Ray | 1 | 0 | | | | | |
| | Ray | 6 | 6 | | | | | | | | | |
| (5) | Guerrero-Arcocha | 4 | 2 | | | | | | | | | |
| | | | | | | | | 1 | Parker | 6 | 6 | 6 |
| | | | | | | | | 7 | Greenberg | 2 | 3 | 2 |
| 7 | Greenberg | 6 | 6 | | | | | | | | | |
| | Chambers | 1 | 3 | | | | | | | | | |
| | | | | 7 | Greenberg | 6 | 6 | | | | | |
| | | | | | Molloy | 1 | 1 | | | | | |
| | Molloy | | | | | | | | | | | |
| (4) | Hecht | w/o | | | | | | | | | | |

#### Section 2

| 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 4 | Mulloy | 6 | 6 | | | | | | | | | | | | | | | | | |
| | Schwartz | 4 | 4 | | 4 | Mulloy | 6 | 3 | 4 | | | | | | | | | | | |
| | Guernsey | 8 | 6 | | | Guernsey | 4 | 6 | 6 | | | | | | | | | | | |
| | Rowbotham | 6 | 4 | | | | | | | | Guernsey | 3 | 2 | | | | | | | |
| | Buzolich | 6 | 6 | | | | | | | | Wood | 6 | 6 | | | | | | | |
| | McManus | 4 | 4 | | | Buzolich | 3 | 3 | | | | | | | | | | | | |
| | Wood | 6 | 8 | | | Wood | 6 | 6 | | | | | | | | | | | | |
| (6) | Rochon | 3 | 6 | | | | | | | | | | | | Wood | 12 | 5 | 4 | 6 | 0 |
| 6 | Cooke | 6 | 6 | | | | | | | | | | | 6 | Cooke | 10 | 7 | 6 | 2 | 6 |
| | Bartzen | 1 | 4 | | 6 | Cooke | 6 | 5 | 6 | | | | | | | | | | | |
| | Hall | 6 | 6 | | | Hall | 3 | 7 | 2 | | | | | | | | | | | |
| | Steele Jr. | 4 | 1 | | | | | | | 6 | Cooke | 6 | 6 | | | | | | | |
| | Brown | 6 | 6 | 6 | | | | | | | Flam | 2 | 2 | | | | | | | |
| | Burke | 8 | 4 | 1 | | Brown | 5 | 2 | | | | | | | | | | | | |
| | Flam | 6 | 6 | | | Flam | 7 | 6 | | | | | | | | | | | | |
| (2) | Weiss | 1 | 2 | | | | | | | | | | | | | | | | | |

#### Section 3

| 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| 2 | Talbert | 6 | 6 | | | | | | | | | | | | | | | | |
| | Hunt | 1 | 0 | | 2 | Talbert | 6 | 6 | | | | | | | | | | | |
| | Dixon | 6 | 4 | 6 | | Dixon | 3 | 2 | | | | | | | | | | | |
| | Bender | 2 | 6 | 4 | | | | | | 2 | Talbert | 6 | 6 | | | | | | |
| | Behrens | 6 | 6 | | | | | | | | Behrens | 1 | 4 | | | | | | |
| | West | 0 | 3 | | | Behrens | 3 | 6 | 6 | | | | | | | | | | |
| (7) | Macken | 6 | 7 | | (7) | Macken | 6 | 3 | 3 | | | | | | | | | | |
| | Van Ryn | 3 | 5 | | | | | | | | | | | | 2 | Talbert | 6 | 6 | 9 |
| 5 | Shields | 6 | 6 | | | | | | | | | | | | (3) | Russell | 1 | 2 | 7 |
| | Hamilton | 3 | 2 | | 5 | Shields | 6 | 6 | | | | | | | | | | | |
| | Moylan | 8 | 6 | | | Moylan | 3 | 2 | | | | | | | | | | | |
| | Giles | 6 | 2 | | | | | | | 5 | Shields | 6 | 4 | 2 | | | | | |
| | Peacock | 6 | 6 | | | | | | | (3) | Russell | 4 | 6 | 6 | | | | | |
| | Osten | 0 | 3 | | | Peacock | 2 | 3 | | | | | | | | | | | |
| (3) | Russell | 7 | 6 | | (3) | Russell | 6 | 6 | | | | | | | | | | | |
| | Tuero | 5 | 2 | | | | | | | | | | | | | | | | |

#### Section 4

| 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 |
| 3 | Segura | 6 | 6 | | | | | | | | | | | | |
| | Buttimer | 2 | 4 | | | | | | | | | | | | |
| | | | | | 3 | Segura | 7 | 6 | 6 | | | | | | |
| | | | | | | Surface | 5 | 8 | 2 | | | | | | |
| | Surface | 6 | 3 | 6 | | | | | | | | | | | |
| | Thomas | 4 | 6 | 3 | | | | | | | | | | | |
| | | | | | | | | | | 3 | Segura | 6 | 4 | 6 | 6 |
| | | | | | | | | | | 8 | Falkenburg | 2 | 6 | 1 | 1 |
| 8 | Falkenburg | 6 | 6 | | | | | | | | | | | | |
| | Henderson | 2 | 2 | | | | | | | | | | | | |
| | | | | | 8 | Falkenburg | 7 | 6 | | | | | | | |
| | | | | | | Livingstone | 5 | 4 | | | | | | | |
| | Livingstone | 6 | 1 | 6 | | | | | | | | | | | |
| (1) | Hammersley | 3 | 6 | 3 | | | | | | | | | | | |