| Singles | |
|---|---|
| 1988 CA-TennisTrophy | |
| Champion |  Horst Skoff |
| Runner-up | Thomas Muster |
| Final score | 4–6, 6–3, 6–4, 6–2 |
| Draw | 32 |
| Seeds | 8 |
Jonas Svensson was the defending champion but lost in the quarterfinals to Horst Skoff.
Skoff won in the final 4–6, 6–3, 6–4, 6–2 against Thomas Muster.
Thomas Muster (Final)
Jonas Svensson (Quarterfinals)
Andrei Chesnokov (Semifinals)
Kevin Curren (Semifinals) Magnus Gustafsson (Second Round)
Michiel Schapers (Quarterfinals)
Sergio Casal (Semifinals)
Marián Vajda (Quarterfinals)| Semifinals | Final | ||||||||||||||
| 1 | Thomas Muster | 6 | 6 | ||||||||||||
| 4 | Kevin Curren | 4 | 4 | ||||||||||||
| 1 | Thomas Muster | 6 | 3 | 4 | 2 | ||||||||||
| Horst Skoff | 4 | 6 | 6 | 6 | |||||||||||
| 3 | Andrei Chesnokov | 5 | 4 | ||||||||||||
| Horst Skoff | 7 | 6 | |||||||||||||
| First Round | Second Round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | T Muster | 6 | 1 | 6 | |||||||||||||||||||||||
 M Laurendeau | 4 | 6 | 3 | 1 | T Muster | 6 | 7 | ||||||||||||||||||||
| WC | A Antonitsch | 6 | 3 | 6 | WC | A Antonitsch | 3 | 6 | |||||||||||||||||||
| J Gunnarsson | 2 | 6 | 1 | 1 | T Muster | 7 | 6 | ||||||||||||||||||||
 M Narducci | 3 | 1 | 8 | M Vajda | 6 | 2 | |||||||||||||||||||||
| Q | C Panatta | 6 | 6 | Q | C Panatta | 3 | 6 | 2 | |||||||||||||||||||
 P Wekesa | 1 | 4 | 8 | M Vajda | 6 | 1 | 6 | ||||||||||||||||||||
| 8 | M Vajda | 6 | 6 | 1 | T Muster | 6 | 6 | ||||||||||||||||||||
| 4 | K Curren | 7 | 6 | 4 | K Curren | 4 | 4 | ||||||||||||||||||||
| P Korda | 6 | 4 | 4 | K Curren | 6 | 3 | 6 | ||||||||||||||||||||
 R Smith | 6 | 6 | R Smith | 4 | 6 | 4 | |||||||||||||||||||||
| WC | M Oberleitner | 3 | 4 | 4 | K Curren | 6 | 6 | ||||||||||||||||||||
| P Lundgren | 6 | 6 | 6 | M Schapers | 2 | 2 | |||||||||||||||||||||
| J Sánchez | 3 | 3 | P Lundgren | 4 | 6 | ||||||||||||||||||||||
| Q | P Palandjian | 0 | 0 | 6 | M Schapers | 6 | 7 | ||||||||||||||||||||
| 6 | M Schapers | 6 | 6 | ||||||||||||||||||||||||
| First Round | Second Round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | M Gustafsson | 3 | 7 | 6 | |||||||||||||||||||||||
| Q | L Jonsson | 6 | 5 | 4 | 5 | M Gustafsson | 5 | 3 | |||||||||||||||||||
 F Roese | 1 | 0 | R Reneberg | 7 | 6 | ||||||||||||||||||||||
| R Reneberg | 6 | 6 | R Reneberg | 2 | 6 | 3 | |||||||||||||||||||||
| N Kroon | 5 | 7 | 2 | 3 | A Chesnokov | 6 | 2 | 6 | |||||||||||||||||||
| A Võsand | 7 | 5 | 6 | A Võsand | 6 | 1 | |||||||||||||||||||||
 Y Doumbia | 5 | 4 | 3 | A Chesnokov | 7 | 6 | |||||||||||||||||||||
| 3 | A Chesnokov | 7 | 6 | 3 | A Chesnokov | 5 | 4 | ||||||||||||||||||||
| 7 | S Casal | 6 | 6 | H Skoff | 7 | 6 | |||||||||||||||||||||
| WC | T Šmíd | 4 | 4 | 7 | S Casal | 7 | 4 | 4 | |||||||||||||||||||
| J Nyström | 1 | 6 | H Skoff | 5 | 6 | 6 | |||||||||||||||||||||
| H Skoff | 6 | 7 | H Skoff | 6 | 6 | ||||||||||||||||||||||
| Q |  G Prpić | 4 | 6 | 2 | J Svensson | 4 | 3 | ||||||||||||||||||||
| C Bergström | 6 | 7 | C Bergström | ||||||||||||||||||||||||
| J Grabb | 2 | 4 | 2 | J Svensson | w/o | ||||||||||||||||||||||
| 2 | J Svensson | 6 | 6 | ||||||||||||||||||||||||
Boris Becker defeated the two-time defending champion Ivan Lendl in the final, 1–6, 6–4, 6–4, 6–4 to win the men's singles tennis title at the 1991 Australian Open.
Emilio Sánchez was the defending champion, but lost in the first round this year.
Karel Nováček was the defending champion of the singles event at the BMW Open, but did not participate this year.
Thomas Enqvist was the defending champion but lost in the semifinals to Jonas Björkman.
Pete Sampras won the title, defeating Jonas Björkman in the final, 6–3, 4–6, 6–3, 6–1
Alberto Mancini was the defending champion but he lost to Andrei Chesnokov in the quarter-finals.
Tim Mayotte was the defending champion but lost in the semifinals to Brad Gilbert.
Horst Skoff was the defending champion but lost in the second round to Glenn Layendecker.
Paul Annacone was the defending champion but lost in the second round to Thomas Muster.
Ivan Lendl was the defending champion but did not compete that year.
Andrei Chesnokov was the defending champion, but lost to Boris Becker in the quarterfinals.
Thomas Enqvist was the defending champion, but lost in the second round this year.
Stefan Edberg was the defending champion, but lost in the second round this year.
Thomas Muster was the defending champion but lost to Goran Prpić in the third round.
Joakim Nyström was the defending champion, but lost to Thomas Muster in the second round.
Mark Kratzmann defeated Stefan Kruger in the final, 6–4, 4–6, 6–3 to win the Boys' Singles tennis title at the 1984 Wimbledon Championships.
Miloslav Mečíř was the defending champion, but lost in the third round to Thomas Muster.
Emilio Sánchez was the defending champion, but lost in the second round to Francisco Roig.
Thomas Muster was the defending champion, but did not compete this year.
Thomas Muster was the defending champion, but lost in the semifinals to Fabrice Santoro.
No defending champions were officially declared as the last edition dates back to 1976, which was won by Lars Elvstrøm.