1989 South African Open – Singles

Jakob Hlasek was the defending champion but did not compete that year.

Christo van Rensburg won in the final 6–4, 7–6, 6–3 against Paul Chamberlin.

Seeds

 * 1) 🇺🇸 Jay Berger (second round)
 * 2) 🇺🇸 Kevin Curren (second round)
 * 3)  Christo van Rensburg (champion)
 * 4) 🇮🇹 Paolo Canè (first round)
 * 5) 🇮🇱 Amos Mansdorf (first round)
 * 6) n/a
 * 7) 🇺🇸 Todd Witsken (first round)
 * 8) 🇺🇸 Scott Davis (first round)