1903 U.S. National Championships – Men's singles
# 1903 U.S. National Championships – Men's singles

Laurence Doherty defeated the two-time defending champion William Larned in a rematch of the previous year's Challenge Round, 6–0, 6–3, 10–8 to win the men's singles tennis title at the 1903 U.S. National Championships. Doherty had defeated William Clothier in the All Comers' Final, which was delayed by a day due to rain.

The event was held at the Newport Casino in Newport, R.I., United States. The entry list consisted of 97 players, which was slightly smaller than that of the previous year.

## Challenge round

| Challenge Round | Challenge Round | Challenge Round | Challenge Round | Challenge Round | Challenge Round | Challenge Round |
| - | - | - | - | - | - | - |
| William Larned | William Larned | 0 | 3 | 8 | | |
| Laurence Doherty | Laurence Doherty | 6 | 6 | 10 | | |

## Draw

### All Comers' finals

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Finals | Finals | Finals | Finals | Finals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| R.C. Seaver | R.C. Seaver | 3 | 2 | 1 | | | | | | | | | | | |
| Richard Carleton | Richard Carleton | 6 | 6 | 6 | | | | | | | | | | | |
| Richard Carleton | Richard Carleton | 6 | 6 | 6 | | Richard Carleton | Richard Carleton | 2 | 0 | 0 | | | | | |
| | | | | | | Laurence Doherty | Laurence Doherty | 6 | 6 | 6 | | | | | |
| Reginald Doherty | Reginald Doherty | | | | | Laurence Doherty | Laurence Doherty | 6 | 6 | 6 | | | | | |
| Laurence Doherty | Laurence Doherty | w/o | | | | | | | | | | | | | |
| Laurence Doherty | Laurence Doherty | w/o | | | | | | | | | Laurence Doherty | Laurence Doherty | 6 | 6 | 6 |
| | | | | | | | | | | | William Clothier | William Clothier | 3 | 2 | 3 |
| Edward Larned | Edward Larned | 6 | 4 | 6 | 6 | | | | | | | | | | | William Clothier | William Clothier | 3 | 2 | 3 |
| Bob Huntington | Bob Huntington | 0 | 6 | 0 | 3 | | | | | | | | | | |
| Bob Huntington | Bob Huntington | 0 | 6 | 0 | 3 | Edward Larned | Edward Larned | 3 | 1 | 2 | | | | | |
| | | | | | | William Clothier | William Clothier | 6 | 6 | 6 | | | | | |
| Harry Allen | Harry Allen | 3 | 1 | 2 | | William Clothier | William Clothier | 6 | 6 | 6 | | | | | |
| William Clothier | William Clothier | 6 | 6 | 6 | | | | | | | | | | | |

### Earlier rounds

**Section 1**

| Second round | Second 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 |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Waidner | Waidner | 4 | 12 | 2 | 6 | 6 | | | | | | | | | | |
| Jones | Jones | 6 | 10 | 6 | 4 | 1 | | | | | | | | | | |
| | | | | | | | Waidner | Waidner | d. | f. | | | | | | |
| | | | | | | | Seaver | Seaver | | | | | | | | |
| Seaver | Seaver | 2 | 1 | 3 | | | | | | | | | | | | |
| Conner | Conner | 6 | 6 | 6 | | | | | | | | | | | | |
| | | | | | | | | | | | | Seaver | Seaver | 6 | 6 | 7 |
| | | | | | | | | | | | | Dionne | Dionne | 1 | 0 | 5 |
| Sedgwick | Sedgwick | 1 | 5 | 8 | 2 | | | | | | | | | | | |
| Norman | Norman | 6 | 7 | 6 | 6 | | | | | | | | | | | |
| | | | | | | | 19 | Norman | 4 | 3 | 2 | | | | | |
| | | | | | | | | Dionne | 6 | 6 | 6 | | | | | |
| Dionne | Dionne | 2 | 6 | 6 | 8 | 7 | | | | | | | | | | |
| Cole | Cole | 6 | 3 | 8 | 6 | 5 | | | | | | | | | | |

**Section 2**

| 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 |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Cross | Cross | 2 | 5 | 0 | | | | | | | | | | | | | |
| Carleton | Carleton | 6 | 7 | 6 | | | | | | | | | | | | | |
| | | | | | | | Carleton | Carleton | 6 | 6 | 6 | | | | | | |
| | | | | | | | Freshman | Freshman | 2 | 3 | 3 | | | | | | |
| Freshman | Freshman | 6 | 6 | 4 | 3 | 6 | | | | | | | | | | | |
| Behr | Behr | 1 | 3 | 6 | 6 | 1 | | | | | | | | | | | |
| | | | | | | | | | | | | | | Carleton | 6 | 6 | 6 |
| | | | | | | | | | | | | | 7 | Whitman | 3 | 2 | 1 |
| Bailey | Bailey | 1 | 2 | 4 | | | | | | | | | | | | | |
| Whitman | Whitman | 6 | 6 | 6 | | | | | | | | | | | | | |
| | | | | | | | Whitman | Whitman | 3 | 8 | 6 | 7 | | | | | |
| | | | | | | | Smith | Smith | 6 | 6 | 0 | 5 | | | | | |
| Neeley | Neeley | | | | | | | | | | | | | | | | |
| Smith | Smith | w/o | | | | | | | | | | | | | | | |

**Section 3**

| 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 |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Ryerson | Ryerson | 0 | 1 | 1 | | | | | | | | | | | |
| Collins | Collins | 6 | 6 | 6 | | | | | | | | | | | |
| | | | | | Collins | Collins | 2 | 6 | 8 | 3 | | | | | |
| | | | | | RF Doherty | RF Doherty | 6 | 2 | 10 | 6 | | | | | |
| Merrill | Merrill | 1 | 2 | 1 | | | | | | | | | | | |
| RF Doherty | RF Doherty | 6 | 6 | 6 | | | | | | | | | | | |
| | | | | | | | | | | | RF Doherty | RF Doherty | 6 | 6 | 6 |
| | | | | | | | | | | | Paret | Paret | 0 | 1 | 2 |
| Henshaw | Henshaw | 4 | 1 | 2 | | | | | | | | | | | |
| Paret | Paret | 6 | 6 | 6 | | | | | | | | | | | |
| | | | | | Paret | Paret | 3 | 8 | 6 | 10 | | | | | |
| | | | | | Beals | Beals | 6 | 6 | 3 | 8 | | | | | |
| Horton | Horton | 3 | 4 | 4 | | | | | | | | | | | |
| Beals | Beals | 6 | 6 | 6 | | | | | | | | | | | |

**Section 4**

| 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 | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | | | Colket | Colket | 2 | 2 | 0 | | | | | | | | | | | |
| Relyea | Relyea | 0 | 1 | 1 | | HL Doherty | HL Doherty | 6 | 6 | 6 | | | | | | | | | | | |
| HL Doherty | HL Doherty | 6 | 6 | 6 | | | | | | | | 9 | HL Doherty | 6 | 6 | 6 | | | | | |
| Stevens | Stevens | 6 | 6 | 6 | | | | | | | | | Stevens | 4 | 2 | 2 | | | | | |
| Dana | Dana | 0 | 1 | 1 | | Stevens | Stevens | w/o | | | | | | | | | | | | | |
| Leech | Leech | | | | | Stiness | Stiness | | | | | | | | | | | | | | |
| Stiness | Stiness | w/o | | | | | | | | | | | | | | | | HL Doherty | 6 | 6 | 6 |
| Miller | Miller | 6 | 6 | 7 | | | | | | | | | | | | | 3 | Mahony | 3 | 2 | 4 |
| Henshaw | Henshaw | 0 | 1 | 5 | | Miller | Miller | 7 | 6 | 7 | 6 | | | | | | | | | | |
| Peters | Peters | | | | | Dering | Dering | 5 | 8 | 9 | 8 | | | | | | | | | | |
| Dering | Dering | w/o | | | | | | | | | | Dering | Dering | 5 | 3 | 2 | | | | | |
| Gates | Gates | 4 | 6 | 4 | 4 | | | | | | | Mahony | Mahony | 7 | 6 | 6 | | | | | |
| Stillman | Stillman | 6 | 2 | 6 | 6 | Stillman | Stillman | 3 | 2 | 3 | | | | | | | | | | | |
| 3 | Otis | | | | | Mahony | Mahony | 6 | 6 | 6 | | | | | | | | | | | |
| | Mahony | w/o | | | | | | | | | | | | | | | | | | | |

**Section 5**

| 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 | Fourth round | Fourth round | Fourth round | Fourth round | Fourth round |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Read | Read | 6 | 4 | 5 | 4 | | | | | | | | | | | | | | | | |
| Horton | Horton | 4 | 6 | 7 | 6 | Horton | Horton | 8 | 4 | 7 | 6 | | | | | | | | | | |
| Mahan | Mahan | 6 | 6 | 6 | | Mahan | Mahan | 6 | 6 | 5 | 0 | | | | | | | | | | |
| Adee | Adee | 3 | 3 | 2 | | | | | | | | Horton | Horton | 6 | 8 | 8 | | | | | |
| Slocum | Slocum | w/o | | | | | | | | | | Melland | Melland | 3 | 6 | 6 | | | | | |
| Thomas | Thomas | | | | | Slocum | Slocum | 5 | 2 | 4 | | | | | | | | | | | |
| Melland | Melland | 6 | 6 | 6 | | Melland | Melland | 7 | 6 | 6 | | | | | | | | | | | |
| Burlingame | Burlingame | 0 | 0 | 0 | | | | | | | | | | | | | Horton | Horton | 7 | 6 | 2 |
| EP Larned | EP Larned | 6 | 6 | 6 | | | | | | | | | | | | | EP Larned | EP Larned | 9 | 8 | 6 |
| Clarke | Clarke | 1 | 1 | 3 | | 17 | EP Larned | 6 | 6 | 6 | | | | | | | | | | | |
| Bartlett | Bartlett | 3 | 5 | 6 | 1 | | Scott | 2 | 2 | 2 | | | | | | | | | | | |
| Scott | Scott | 6 | 7 | 4 | 6 | | | | | | | EP Larned | EP Larned | 6 | 6 | 6 | | | | | |
| | | | | | | | | | | | | Avery | Avery | 2 | 3 | 1 | | | | | |
| | | | | | | Manson | Manson | | | | | | | | | | | | | | |
| | | | | | | Avery | Avery | w/o | | | | | | | | | | | | | |

**Section 6**

| Second round | Second 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 |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Morris | Morris | 1 | 0 | 1 | | | | | | | | | | | | | | |
| Leonard | Leonard | 6 | 6 | 6 | | | | | | | | | | | | | | |
| | | | | | | | Leonard | Leonard | 6 | 6 | 6 | | | | | | | |
| | | | | | | | Bull | Bull | 1 | 4 | 2 | | | | | | | |
| White | White | 7 | 2 | 1 | 6 | 3 | | | | | | | | | | | | |
| Bull | Bull | 5 | 6 | 6 | 3 | 6 | | | | | | | | | | | | |
| | | | | | | | | | | | | Leonard | Leonard | 11 | 7 | 4 | 5 | 3 |
| | | | | | | | | | | | | Huntington | Huntington | 9 | 5 | 6 | 7 | 6 |
| Burden | Burden | 6 | 6 | 6 | | | | | | | | | | | | | | |
| Scott | Scott | 4 | 0 | 4 | | | | | | | | | | | | | | |
| | | | | | | | | Burden | 1 | 2 | 4 | | | | | | | |
| | | | | | | | 5 | Huntington | 6 | 6 | 6 | | | | | | | |
| | Hoskins | 2 | 2 | 2 | | | | | | | | | | | | | | |
| 5 | Huntington | 6 | 6 | 6 | | | | | | | | | | | | | | |

**Section 7**

| 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 |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Codman | Codman | 7 | 6 | 6 | | | | | | | | | | |
| Appleton | Appleton | 5 | 2 | 3 | | | | | | | | | | |
| | | | | | Codman | Codman | 6 | 6 | 6 | | | | | |
| | | | | | Blanding | Blanding | 3 | 0 | 1 | | | | | |
| Blanding | Blanding | w/o | | | | | | | | | | | | |
| Devens | Devens | | | | | | | | | | | | | |
| | | | | | | | | | | Codman | Codman | 0 | 2 | 0 |
| | | | | | | | | | | Allen | Allen | 6 | 6 | 6 |
| Reid | Reid | | | | | | | | | | | | | |
| Ridgway | Ridgway | w/o | | | | | | | | | | | | |
| | | | | | Ridgway | Ridgway | 5 | 4 | 1 | | | | | |
| | | | | | Allen | Allen | 7 | 6 | 6 | | | | | |
| Havermayer | Havermayer | | | | | | | | | | | | | |
| Allen | Allen | w/o | | | | | | | | | | | | |

**Section 8**

| 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 | Fourth round |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Lamb | Lamb | 1 | 2 | 3 | | | | | | | | | | | | | |
| Ward | Ward | 6 | 6 | 6 | | | | | | | | | | | | | |
| | | | | | | Ward | Ward | w/o | | | | | | | | | |
| | | | | | | Willis | Willis | | | | | | | | | | |
| Willis | Willis | 6 | 6 | 6 | | | | | | | | | | | | | |
| Livermore | Livermore | 2 | 4 | 4 | | | | | | | | | | | | | |
| | | | | | | | | | | | | Ward | Ward | 2 | 4 | 7 | 5 |
| | | | | | | | | | | | | Clothier | Clothier | 6 | 6 | 5 | 7 |
| Holt | Holt | | | | | | | | | | | | | | | | |
| Sands | Sands | w/o | | | | | | | | | | | | | | | |
| | | | | | | | Sands | 2 | 6 | 3 | 1 | | | | | | |
| | | | | | | 1 | Clothier | 6 | 4 | 6 | 6 | | | | | | |
| Wright | Wright | 6 | 4 | 4 | 1 | | | | | | | | | | | | |
| Clothier | Clothier | 4 | 6 | 6 | 6 | | | | | | | | | | | | |
