26‑Nov‑1990 | Munich CH | Carpet | SF | 179 | 148 | Richard Krajicek [NED] d. Zoecke | 7-6 6-4 | | | | | | | | | |
26‑Nov‑1990 | Munich CH | Carpet | QF | 179 | 125 | Zoecke d. Nicklas Kroon [SWE] | 7-5 6-4 | | | | | | | | | |
26‑Nov‑1990 | Munich CH | Carpet | R16 | 179 | 86 | Zoecke d. (3)Alexander Mronz [GER] | W/O | | | | | | | | | |
26‑Nov‑1990 | Munich CH | Carpet | R32 | 179 | 489 | Zoecke d. (WC)Rudiger Haas [GER] | 7-5 6-4 | | | | | | | | | |
8‑Oct‑1990 | Berlin | Carpet | R16 | 156 | 17 | (2)Jonas Svensson [SWE] d. (WC)Zoecke | 6-2 5-7 6-2 | | | | | | | | | |
8‑Oct‑1990 | Berlin | Carpet | R32 | 156 | 85 | 6-4 6-7 6-1 | | | | | | | | | |
9‑Jul‑1990 | Gstaad | Clay | R32 | 132 | 10 | (3)Martin Jaite [ARG] d. Zoecke | 7-5 6-4 | | | | | | | | | |
25‑Jun‑1990 | Wimbledon | Grass | R128 | 118 | 111 | Olivier Delaitre [FRA] d. Zoecke | 7-5 6-4 3-6 6-2 | | | | | | | | | |
11‑Jun‑1990 | Queen's Club | Grass | R32 | 130 | 3 | (2)Stefan Edberg [SWE] d. Zoecke | 6-0 6-3 | | | | | | | | | |
11‑Jun‑1990 | Queen's Club | Grass | R64 | 130 | 65 | Zoecke d. Paul Annacone [USA] | 6-4 3-6 6-3 | | | | | | | | | |
28‑May‑1990 | Roland Garros | Clay | R128 | 127 | 45 | Jordi Arrese [ESP] d. (LL)Zoecke | 6-4 3-6 6-3 6-1 | | | | | | | | | |
7‑May‑1990 | Hamburg Masters | Clay | R64 | 116 | 76 | Andrei Cherkasov [RUS] d. (WC)Zoecke | 6-2 6-2 | | | | | | | | | |
30‑Apr‑1990 | Singapore | Hard | R32 | 114 | 152 | Kelly Jones [USA] d. Zoecke | 6-4 6-2 | | | | | | | | | |
23‑Apr‑1990 | Hong Kong | Hard | R16 | 118 | 229 | (Q)Jonathan Canter [USA] d. Zoecke | 4-6 6-4 6-3 | | | | | | | | | |
23‑Apr‑1990 | Hong Kong | Hard | R32 | 118 | 75 | Zoecke d. (7)Kelly Evernden [NZL] | 5-7 6-3 6-4 | | | | | | | | | |
9‑Apr‑1990 | Barcelona | Clay | R32 | 124 | 12 | (2)Martin Jaite [ARG] d. Zoecke | 6-1 7-6 | | | | | | | | | |
9‑Apr‑1990 | Barcelona | Clay | R64 | 124 | 242 | Zoecke d. (Q)Jose Clavet [ESP] | 7-6 6-4 | | | | | | | | | |
2‑Apr‑1990 | Orlando | Hard | R32 | | | (2)Aaron Krickstein [USA] d. Zoecke | 6-1 6-2 | | | | | | | | | |
16‑Mar‑1990 | Miami Masters | Hard | R64 | 122 | 39 | (26)Goran Ivanisevic [CRO] d. (Q)Zoecke | 4-6 5-1 RET | | | | | | | | | |
16‑Mar‑1990 | Miami Masters | Hard | R128 | 122 | 58 | (Q)Zoecke d. Jimmy Arias [USA] | 6-4 6-4 | | | | | | | | | |
19‑Feb‑1990 | Stuttgart Indoor | Carpet | R32 | 111 | 19 | (6)Horst Skoff [AUT] d. (Q)Zoecke | 6-4 3-6 6-3 | | | | | | | | | |
5‑Feb‑1990 | Milan | Carpet | R16 | | | Pete Sampras [USA] d. (Q)Zoecke | 6-1 7-6 | | | | | | | | | |
5‑Feb‑1990 | Milan | Carpet | R32 | | | (Q)Zoecke d. (6)Jimmy Connors [USA] | 6-3 4-6 7-6 | | | | | | | | | |
15‑Jan‑1990 | Australian Open | Hard | R128 | 131 | 73 | Ramesh Krishnan [IND] d. Zoecke | 4-6 7-5 6-4 5-7 6-1 | | | | | | | | | |
8‑Jan‑1990 | Auckland | Hard | R32 | 136 | 18 | (1)Andrei Chesnokov [RUS] d. (Q)Zoecke | 7-6 6-7 7-5 | | | | | | | | | |
1‑Jan‑1990 | Wellington | Hard | R32 | 134 | 105 | Veli Paloheimo [FIN] d. Zoecke | 6-3 6-2 | | | | | | | | | |