# 1988 Porsche Tennis Grand Prix – Singles

First-seeded Martina Navratilova was the defending champion and won in the final 6–2, 6–3 against Chris Evert.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Martina Navratilova (champion)
* Chris Evert (final)
* Gabriela Sabatini (first round)
* Claudia Kohde-Kilsch (first round)
* Mary Joe Fernández (second round)
* Sylvia Hanika (quarterfinals)
* Arantxa Sánchez (first round)
* Raffaella Reggi (semifinals)

## 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
| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | M Navratilova | 6 | 6 | | | | | | | | | | | | | | | | | | | |
| | C Porwik | 1 | 2 | | 1 | M Navratilova | 6 | 6 | | | | | | | | | | | | | | |
| Q | C Suire | 6 | 4 | | | B Schultz | 0 | 2 | | | | | | | | | | | | | | |
| | B Schultz | 7 | 6 | | | | | | | 1 | M Navratilova | 6 | 6 | | | | | | | | | |
| | B Cordwell | 3 | 2 | | | | | | | | R Zrubáková | 1 | 0 | | | | | | | | | |
| | R Zrubáková | 6 | 6 | | | R Zrubáková | w/o | | | | | | | | | | | | | | | |
| Q | S Amiach | 3 | 4 | | 5 | M J Fernández | | | | | | | | | | | | | | | | |
| 5 | M J Fernández | 6 | 6 | | | | | | | | | | | | 1 | M Navratilova | 6 | 6 | | | | |
| 3 | G Sabatini | 6 | 6 | 6 | | | | | | | | | | | | E Pfaff | 4 | 2 | | | | |
| | J Novotná | 1 | 7 | 7 | | J Novotná | 0 | 1 | | | | | | | | | | | | | | |
| | D van Rensburg | 6 | 4 | 3 | | E Reinach | 6 | 6 | | | | | | | | | | | | | | |
| | E Reinach | 3 | 6 | 6 | | | | | | | E Reinach | 3 | 6 | 4 | | | | | | | | |
| | I Cueto | 6 | 7 | | | | | | | | E Pfaff | 6 | 4 | 6 | | | | | | | | |
| | J Halard | 4 | 5 | | | I Cueto | 6 | 4 | 5 | | | | | | | | | | | | | |
| | E Pfaff | 4 | 7 | 6 | | E Pfaff | 3 | 6 | 7 | | | | | | | | | | | | | |
| 7 | A Sánchez | 6 | 5 | 4 | | | | | | | | | | | | | | | 1 | Martina Navratilova | 6 | 6 |
| 8 | R Reggi | 4 | 7 | 6 | | | | | | | | | | | | | | | 2 | Chris Evert | 2 | 3 |
| Q | C Tanvier | 6 | 5 | 2 | 8 | R Reggi | 6 | 6 | | | | | | | | | | | | | | |
| | J Wiesner | 3 | 6 | 6 | | J Wiesner | 4 | 4 | | | | | | | | | | | | | | |
| | M Javer | 6 | 2 | 0 | | | | | | 8 | R Reggi | 6 | 6 | | | | | | | | | |
| | N Tauziat | 6 | 6 | | | | | | | | N Tauziat | 2 | 3 | | | | | | | | | |
| | J Durie | 3 | 2 | | | N Tauziat | 6 | 6 | | | | | | | | | | | | | | |
| | B Paulus | 6 | 6 | | | B Paulus | 2 | 2 | | | | | | | | | | | | | | |
| 4 | C Kohde-Kilsch | 3 | 2 | | | | | | | | | | | | 8 | R Reggi | 3 | 1 | | | | |
| 6 | S Hanika | 6 | 6 | | | | | | | | | | | | 2 | C Evert | 6 | 6 | | | | |
| | S Goleš | 2 | 2 | | 6 | S Hanika | 6 | 3 | 7 | | | | | | | | | | | | | |
| | I Demongeot | 3 | 6 | 7 | | I Demongeot | 4 | 6 | 6 | | | | | | | | | | | | | |
| Q | J Pospíšilová | 6 | 4 | 6 | | | | | | 6 | S Hanika | 0 | 4 | | | | | | | | | |
| | C Lindqvist | 4 | 6 | 6 | | | | | | 2 | C Evert | 6 | 6 | | | | | | | | | |
| | W Probst | 6 | 4 | 4 | | C Lindqvist | 1 | 6 | | | | | | | | | | | | | | |
| | S Meier | 3 | 5 | | 2 | C Evert | 6 | 7 | | | | | | | | | | | | | | |
| 2 | C Evert | 6 | 7 | | | | | | | | | | | | | | | | | | | |