1889 U.S. National Championships – Men's singles
# 1889 U.S. National Championships – Men's singles

Defending champion Henry Slocum defeated Quincy Shaw in the Challenge Round, 6–3, 6–1, 4–6, 6–2 to win the men's singles tennis title at the 1887 U.S. National Championships. Shaw defeated Oliver Campbell in the All Comers' Final, 1–6, 6–4, 6–3, 6–4. The event was held at the Newport Casino, Newport, R.I. from August 21 to August 28.

## Draw

### Challenge round

| Challenge round | Challenge round | Challenge round | Challenge round | Challenge round | Challenge round | Challenge round |
| - | - | - | - | - | - | - |
| Henry Slocum | Henry Slocum | 6 | 6 | 4 | 6 | |
| Quincy A Shaw | Quincy A Shaw | 3 | 1 | 6 | 2 | |

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Finals | Finals | Finals | Finals | Finals | Finals |
| - | - | - | - | - | - | - | - | - | - | - | - | - |
| Quincy A Shaw | Quincy A Shaw | 4 | 6 | 6 | 6 | | | | | | | |
| Percy Knapp | Percy Knapp | 6 | 1 | 4 | 4 | | | | | | | |
| Percy Knapp | Percy Knapp | 6 | 1 | 4 | 4 | | Quincy A Shaw | Quincy A Shaw | 1 | 6 | 6 | 6 |
| | | | | | | | Oliver Campbell | Oliver Campbell | 6 | 4 | 3 | 4 |
| Ernest Meers | Ernest Meers | 7 | 1 | 7 | 4 | 2 | Oliver Campbell | Oliver Campbell | 6 | 4 | 3 | 4 |
| Oliver Campbell | Oliver Campbell | 5 | 6 | 5 | 6 | 6 | | | | | | |

### 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 | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| CA Chase | CA Chase | 6 | 6 | 6 | | | | | | | | | | | | | | | | | | | |
| FOS Reade | FOS Reade | 0 | 3 | 1 | | CA Chase | CA Chase | 6 | 6 | 6 | | | | | | | | | | | | | |
| RB Hale | RB Hale | 6 | 6 | 6 | | RB Hale | RB Hale | 4 | 0 | 3 | | | | | | | | | | | | | |
| A Rives | A Rives | 2 | 2 | 1 | | | | | | | | CA Chase | CA Chase | 4 | 4 | 6 | 3 | | | | | | |
| RV Beach | RV Beach | 6 | 6 | 8 | | | | | | | | QA Shaw | QA Shaw | 6 | 6 | 4 | 6 | | | | | | |
| FW Taylor | FW Taylor | 2 | 2 | 6 | | RV Beach | RV Beach | 9 | 4 | 0 | 2 | | | | | | | | | | | | |
| QA Shaw | QA Shaw | 7 | 7 | 6 | 6 | QA Shaw | QA Shaw | 7 | 6 | 6 | 6 | | | | | | | | | | | | |
| A Empie Wright | A Empie Wright | 9 | 5 | 3 | 4 | | | | | | | | | | | | | QA Shaw | QA Shaw | 4 | 6 | 6 | 6 |
| J Ryerson | J Ryerson | 6 | 5 | 6 | 7 | | | | | | | | | | | | | P Knapp | P Knapp | 6 | 1 | 4 | 4 |
| AL Williston | AL Williston | 0 | 7 | 0 | 5 | J Ryerson | J Ryerson | 5 | 6 | 2 | | | | | | | | | | | | | |
| P Knapp | P Knapp | 6 | 8 | 4 | 6 | P Knapp | P Knapp | 7 | 8 | 6 | | | | | | | | | | | | | |
| M Fielding | M Fielding | 2 | 6 | 6 | 2 | | | | | | | P Knapp | P Knapp | 6 | 6 | 6 | | | | | | | |
| D Miller | D Miller | 6 | 8 | 6 | | | | | | | | D Miller | D Miller | 4 | 3 | 2 | | | | | | | |
| RC Sands | RC Sands | 4 | 6 | 1 | | D Miller | D Miller | 6 | 6 | 6 | | | | | | | | | | | | | |
| GR Fearing | GR Fearing | 6 | 6 | 6 | | GR Fearing | GR Fearing | 2 | 2 | 3 | | | | | | | | | | | | | |
| WW Reece | WW Reece | 3 | 2 | 4 | | | | | | | | | | | | | | | | | | | |

**Section 2**

| 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 | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| FLV Hoppin | FLV Hoppin | 6 | 6 | 6 | | | | | | | | | | | | | | | | | | | | | |
| SC Fox | SC Fox | 3 | 0 | 1 | | FLV Hoppin | FLV Hoppin | 5 | 0 | 1 | | | | | | | | | | | | | | | |
| FS Mansfield | FS Mansfield | 9 | 6 | 6 | | FS Mansfield | FS Mansfield | 7 | 6 | 6 | | | | | | | | | | | | | | | |
| TS Tailer | TS Tailer | 7 | 0 | 1 | | | | | | | | | FS Mansfield | FS Mansfield | 1 | 2 | 2 | | | | | | | | |
| MR Wright | MR Wright | 6 | 6 | 6 | | | | | | | | | E Meers | E Meers | 6 | 6 | 6 | | | | | | | | |
| EW Gould | EW Gould | 3 | 0 | 2 | | MR Wright | MR Wright | 5 | 3 | 4 | | | | | | | | | | | | | | | |
| E Meers | E Meers | 6 | 6 | 6 | | E Meers | E Meers | 7 | 6 | 6 | | | | | | | | | | | | | | | |
| CE Sands | CE Sands | 4 | 3 | 4 | | | | | | | | | | | | | | | E Meers | E Meers | 7 | 1 | 7 | 4 | 2 |
| ST Chase | ST Chase | 8 | 6 | 2 | 6 | | | | | | | | | | | | | | O Campbell | O Campbell | 5 | 6 | 5 | 6 | 6 |
| GA Hurd | GA Hurd | 6 | 4 | 6 | 4 | ST Chase | ST Chase | 6 | 1 | 6 | 4 | 5 | | | | | | | | | | | | | |
| J Clark | J Clark | 6 | 7 | 6 | | J Clark | J Clark | 2 | 6 | 0 | 6 | 7 | | | | | | | | | | | | | |
| WR Weeden | WR Weeden | 3 | 5 | 4 | | | | | | | | | J Clark | J Clark | 12 | 5 | 3 | 3 | | | | | | | |
| H Taylor | H Taylor | 6 | 6 | 6 | | | | | | | | | O Campbell | O Campbell | 10 | 7 | 6 | 6 | | | | | | | |
| R Huntington | R Huntington | 3 | 3 | 0 | | H Taylor | H Taylor | 4 | 2 | 5 | | | | | | | | | | | | | | | |
| O Campbell | O Campbell | 6 | 6 | 6 | | O Campbell | O Campbell | 6 | 6 | 7 | | | | | | | | | | | | | | | |
| EV Thompson | EV Thompson | 4 | 1 | 2 | | | | | | | | | | | | | | | | | | | | | |
