24‑Nov‑1986 | Itaparica | Hard | R32 | 164 | 236 | (WC)Fernando Roese [BRA] d. Duncan | 6-4 4-1 RET | | | | | | | | | |
10‑Nov‑1986 | Buenos Aires | Clay | R32 | 150 | 192 | (WC)Franco Davin [ARG] d. Duncan | 2-6 6-2 6-4 | | | | | | | | | |
3‑Nov‑1986 | Sao Paulo CH | Hard | R32 | 151 | 83 | (1)Eduardo Bengoechea [ARG] d. Duncan | 1-6 6-2 7-6 | | | | | | | | | |
29‑Sep‑1986 | Palermo | Clay | R32 | 142 | 157 | Claudio Pistolesi [ITA] d. Duncan | 6-3 6-3 | | | | | | | | | |
11‑Aug‑1986 | St. Vincent | Clay | QF | 175 | 46 | (3)Paul Mcnamee [AUS] d. Duncan | 6-4 6-4 | | | | | | | | | |
11‑Aug‑1986 | St. Vincent | Clay | R16 | 175 | 373 | Duncan d. (Q)Gustavo Luza [ARG] | 7-6 7-5 | | | | | | | | | |
11‑Aug‑1986 | St. Vincent | Clay | R32 | 175 | 120 | Duncan d. (6)Claudio Mezzadri [SUI] | 6-2 6-4 | | | | | | | | | |
4‑Aug‑1986 | Kitzbuhel | Clay | R32 | 188 | 197 | Balazs Taroczy [HUN] d. Duncan | 3-6 6-3 6-4 | | | | | | | | | |
4‑Aug‑1986 | Kitzbuhel | Clay | R64 | 188 | 22 | Duncan d. (7)Guillermo Vilas [ARG] | 6-2 6-2 | | | | | | | | | |
28‑Jul‑1986 | Washington | Clay | R32 | 187 | 33 | (12)Horacio De La Pena [ARG] d. Duncan | 6-4 6-1 | | | | | | | | | |
28‑Jul‑1986 | Washington | Clay | R64 | 187 | 175 | Duncan d. Hans Gildemeister [CHI] | 7-6 6-0 | | | | | | | | | |
21‑Jul‑1986 | Boston | Clay | R32 | 155 | 12 | (1)Andres Gomez [ECU] d. Duncan | 2-6 6-3 6-3 | | | | | | | | | |
21‑Jul‑1986 | Boston | Clay | R64 | 155 | 268 | Duncan d. (Q)Tom Cain [USA] | 6-3 6-1 | | | | | | | | | |
26‑May‑1986 | Roland Garros | Clay | R64 | 151 | 43 | Eliot Teltscher [USA] d. Duncan | 7-5 7-5 6-1 | | | | | | | | | |
26‑May‑1986 | Roland Garros | Clay | R128 | 151 | 67 | Duncan d. Nduka Odizor [NGR] | 6-3 6-7 7-6 6-0 | | | | | | | | | |
19‑May‑1986 | Florence | Clay | R32 | 139 | 41 | (8)Diego Perez [URU] d. Duncan | 5-7 6-4 6-2 | | | | | | | | | |
12‑May‑1986 | Rome | Clay | R64 | 125 | 51 | Eliot Teltscher [USA] d. Duncan | 4-6 6-0 7-5 | | | | | | | | | |
5‑May‑1986 | Munich | Clay | R32 | 83 | 51 | (8)Libor Pimek [BEL] d. Duncan | 6-1 6-7 6-4 | | | | | | | | | |
28‑Apr‑1986 | Madrid | Clay | R16 | 89 | 143 | Luiz Mattar [BRA] d. (5)Duncan | 6-4 6-2 | | | | | | | | | |
28‑Apr‑1986 | Madrid | Clay | R32 | 89 | 181 | (5)Duncan d. Roberto Saad [ARG] | 6-2 6-1 | | | | | | | | | |
21‑Apr‑1986 | Monte Carlo | Clay | R64 | 70 | 37 | Jakob Hlasek [SUI] d. Duncan | 6-1 6-4 | | | | | | | | | |
14‑Apr‑1986 | Nice | Clay | R32 | 54 | 28 | (4)Guy Forget [FRA] d. Duncan | 5-7 6-4 6-2 | | | | | | | | | |
7‑Apr‑1986 | Bari | Clay | QF | 53 | 52 | (4)Kent Carlsson [SWE] d. (5)Duncan | 6-0 6-1 | | | | | | | | | |
7‑Apr‑1986 | Bari | Clay | R16 | 53 | 130 | (5)Duncan d. Darren Cahill [AUS] | 6-3 6-3 | | | | | | | | | |
7‑Apr‑1986 | Bari | Clay | R32 | 53 | 315 | (5)Duncan d. Bernhard Pils [AUT] | 6-2 6-3 | | | | | | | | | |
17‑Mar‑1986 | Fort Myers | Hard | R32 | 54 | 67 | Eliot Teltscher [USA] d. Duncan | 7-6 6-1 | | | | | | | | | |
10‑Feb‑1986 | Boca West | Hard | R64 | 58 | 17 | (15)Andres Gomez [ECU] d. Duncan | 6-4 6-4 | | | | | | | | | |
10‑Feb‑1986 | Boca West | Hard | R128 | 58 | 122 | Duncan d. Ricki Osterthun [GER] | 7-6 3-6 7-6 | | | | | | | | | |
3‑Feb‑1986 | Memphis | Carpet | R32 | 55 | 30 | (16)Peter Lundgren [SWE] d. Duncan | 6-3 6-7 6-3 | | | | | | | | | |
3‑Feb‑1986 | Memphis | Carpet | R64 | 55 | 246 | Duncan d. (Q)Tom Nijssen [NED] | 6-2 7-6 | | | | | | | | | |
27‑Jan‑1986 | Vina Del Mar CH | Clay | F | 59 | 147 | (5)Hans Gildemeister [CHI] d. (1)Duncan | 6-1 6-0 | | | | | | | | | |
27‑Jan‑1986 | Vina Del Mar CH | Clay | SF | 59 | 393 | (1)Duncan d. Gerardo Vacarezza [CHI] | 6-2 6-2 | | | | | | | | | |
27‑Jan‑1986 | Vina Del Mar CH | Clay | QF | 59 | 202 | (1)Duncan d. Gustavo Guerrero [ARG] | 6-2 3-6 6-4 | | | | | | | | | |
27‑Jan‑1986 | Vina Del Mar CH | Clay | R16 | 59 | 390 | (1)Duncan d. Belus Prajoux [CHI] | 6-4 7-6 | | | | | | | | | |
27‑Jan‑1986 | Vina Del Mar CH | Clay | R32 | 59 | 242 | (1)Duncan d. Ricardo Rivera [ARG] | 6-4 6-3 | | | | | | | | | |