# 1988 OTB Open – Men's singles

Jaime Yzaga was the defending champion, but did not participate this year.
Tim Mayotte won the tournament, beating Johan Kriek in the final, 5–7, 6–3, 6–2.

## Seeds

* Tim Mayotte (champion)
* Paul Annacone (second round)
* Johan Kriek (final)
* Michael Kures (first round)
* Martin Laurendeau (first round)
* Richard Matuszewski (second round)
* Michael Robertson (first round)
* Rikard Bergh (first round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Tim Mayotte | 6 | 7 | | | | | |
| | Pete Sampras | 2 | 6 | | | | | |
| | Pete Sampras | 2 | 6 | 1 | Tim Mayotte | 5 | 6 | 6 |
| | | | | 3 | Johan Kriek | 7 | 3 | 2 |
| 3 | Johan Kriek | 6 | 6 | 3 | Johan Kriek | 7 | 3 | 2 |
| | Thomas Högstedt | 0 | 2 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | T Mayotte | 6 | 7 | | | | | | | | | | | | | | |
| Q | M Basham | 2 | 5 | | 1 | T Mayotte | 6 | 6 | | | | | | | | | |
| | C Geyer | 4 | 1 | | | G Layendecker | 4 | 3 | | | | | | | | | |
| | G Layendecker | 6 | 6 | | | | | | | 1 | T Mayotte | 7 | 6 | | | | |
| | P Johnson | 3 | 6 | 6 | | | | | | | L Lavalle | 6 | 2 | | | | |
| | S DeVries | 6 | 3 | 1 | | P Johnson | 7 | 2 | 2 | | | | | | | | |
| | L Lavalle | 6 | 7 | | | L Lavalle | 5 | 6 | 6 | | | | | | | | |
| 7 | M Robertson | 4 | 6 | | | | | | | | | | | 1 | T Mayotte | 6 | 7 |
| 4 | M Kures | 6 | 6 | 4 | | | | | | | | | | | P Sampras | 2 | 6 |
| | G Pozzi | 2 | 7 | 6 | | G Pozzi | 1 | 5 | | | | | | | | | |
| | P Sampras | 6 | 6 | | | P Sampras | 6 | 7 | | | | | | | | | |
| | W Popp | 2 | 1 | | | | | | | | P Sampras | 6 | 6 | | | | |
| | D Burke | 6 | 6 | | | | | | | | D Burke | 3 | 3 | | | | |
| | J Gurfein | 3 | 4 | | | D Burke | 6 | 7 | | | | | | | | | |
| WC | M Blackman | 6 | 6 | 6 | WC | M Blackman | 3 | 6 | | | | | | | | | |
| 5 | M Laurendeau | 7 | 4 | 2 | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | R Matuszewski | 6 | 6 | | | | | | | | | | | | | |
| | A Mronz | 4 | 4 | 6 | R Matuszewski | 3 | 4 | | | | | | | | | |
| | T Mmoh | 2 | 3 | WC | P McEnroe | 6 | 6 | | | | | | | | | |
| WC | P McEnroe | 6 | 6 | | | | | | WC | P McEnroe | 3 | 6 | | | | |
| | Z Ali | 6 | 7 | | | | | | 3 | J Kriek | 6 | 7 | | | | |
| | P Chamberlin | 3 | 6 | | Z Ali | 3 | 2 | | | | | | | | | |
| | M Bauer | 2 | 5 | 3 | J Kriek | 6 | 6 | | | | | | | | | |
| 3 | J Kriek | 6 | 7 | | | | | | | | | | 3 | J Kriek | 6 | 6 |
| 8 | R Bergh | 6 | 1$^r$ | | | | | | | | | | | T Högstedt | 0 | 2 |
| Q | C Beckman | 7 | 4 | Q | C Beckman | 4 | 3 | | | | | | | | | |
| | J Levine | 1 | 4 | Q | D Goldberg | 6 | 6 | | | | | | | | | |
| Q | D Goldberg | 6 | 6 | | | | | | Q | D Goldberg | 5 | 2 | | | | |
| Q | D Montes de Oca | 2 | 2 | | | | | | | T Högstedt | 7 | 6 | | | | |
| | T Högstedt | 6 | 6 | | T Högstedt | 0 | 6 | 7 | | | | | | | | |
| | L Scott | 1 | 2 | 2 | P Annacone | 6 | 2 | 5 | | | | | | | | |
| 2 | P Annacone | 6 | 6 | | | | | | | | | | | | | |