# 1989 Benson and Hedges Open – Singles

Ramesh Krishnan defeated Amos Mansdorf 6–4, 6–0 to win the 1989 Benson and Hedges Open singles competition. Mansdorf was the defending champion.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
* Amos Mansdorf (final)
* Ramesh Krishnan (champion)
* Milan Šrejber (second round)
* Michiel Schapers (first round)
* Richard Matuszewski (first round)
* Horacio de la Peña (second round)
* Shuzo Matsuoka (first round)
* Jim Grabb (quarterfinals)

## Draw
### Key

* Q – Qualifier
* WC –Wild card
* LL – l=Lucky loser
| 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 | A Mansdorf | 6 | 6 | | | | | | | | | | | | | | | | | | | |
| | M Oosting | 4 | 4 | | 1 | A Mansdorf | 7 | 6 | | | | | | | | | | | | | | |
| LL | J Cunha-Silva | 1 | 4 | | Q | D Wheaton | 5 | 1 | | | | | | | | | | | | | | |
| Q | D Wheaton | 6 | 6 | | | | | | | 1 | A Mansdorf | 6 | 2 | 6 | | | | | | | | |
| | C Pridham | 7 | 6 | 5 | | | | | | | P Wekesa | 4 | 6 | 2 | | | | | | | | |
| | M Westphal | 6 | 7 | 7 | | M Westphal | 6 | 3 | 7 | | | | | | | | | | | | | |
| | P Wekesa | 7 | 6 | | | P Wekesa | 4 | 6 | 9 | | | | | | | | | | | | | |
| 7 | S Matsuoka | 6 | 2 | | | | | | | | | | | | 1 | A Mansdorf | 6 | 6 | | | | |
| 4 | M Schapers | 4 | 4 | | | | | | | | | | | | | R Smith | 3 | 2 | | | | |
| | P Chamberlin | 6 | 6 | | | P Chamberlin | 2 | 6 | | | | | | | | | | | | | | |
| | R Smith | 6 | 7 | | | R Smith | 6 | 7 | | | | | | | | | | | | | | |
| WC | S Lewis | 3 | 6 | | | | | | | | R Smith | 7 | 6 | | | | | | | | | |
| | S Guy | 1 | 7 | 1 | | | | | | | K Evernden | 5 | 2 | | | | | | | | | |
| | K Evernden | 6 | 6 | 6 | | K Evernden | 6 | 3 | 6 | | | | | | | | | | | | | |
| | U Riglewski | 6 | 4 | 6 | | U Riglewski | 4 | 6 | 4 | | | | | | | | | | | | | |
| 5 | R Matuszewski | 1 | 6 | 2 | | | | | | | | | | | | | | | 1 | Amos Mansdorf | 4 | 0 |
| WC/6 | H de la Peña | 6 | 3 | 6 | | | | | | | | | | | | | | | 2 | Ramesh Krishnan | 6 | 6 |
| Q | G Pozzi | 3 | 6 | 2 | WC/6 | H de la Peña | 6 | 5 | 2 | | | | | | | | | | | | | |
| | B Dyke | 2 | 7 | 4 | | G Michibata | 3 | 7 | 6 | | | | | | | | | | | | | |
| | G Michibata | 6 | 6 | 6 | | | | | | | G Michibata | 1 | 3 | | | | | | | | | |
| | R Reneberg | 6 | 4 | 6 | | | | | | | R Reneberg | 6 | 6 | | | | | | | | | |
| | D Marcelino | 3 | 6 | 3 | | R Reneberg | 6 | 6 | | | | | | | | | | | | | | |
| | V Paloheimo | 5 | 7 | 3 | 3 | M Šrejber | 3 | 4 | | | | | | | | | | | | | | |
| 3 | M Šrejber | 7 | 6 | 6 | | | | | | | | | | | | R Reneberg | 6 | 3 | | | | |
| 8 | J Grabb | 6 | 7 | | | | | | | | | | | | 2 | R Krishnan | 7 | 6 | | | | |
| Q | J Ross | 4 | 5 | | 8 | J Grabb | 1 | 6 | 6 | | | | | | | | | | | | | |
| | J Brown | 4 | 6 | 7 | Q | R Weiss | 6 | 2 | 0 | | | | | | | | | | | | | |
| Q | R Weiss | 6 | 1 | 9 | | | | | | 8 | J Grabb | 5 | 0 | | | | | | | | | |
| | T Svantesson | 6 | 7 | | | | | | | 2 | R Krishnan | 7 | 6 | | | | | | | | | |
| WC | A Lobb | 2 | 6 | | | T Svantesson | 3 | 3 | | | | | | | | | | | | | | |
| | M Kures | 1 | 6 | | 2 | R Krishnan | 6 | 6 | | | | | | | | | | | | | | |
| 2 | R Krishnan | 6 | 7 | | | | | | | | | | | | | | | | | | | |