Includes finals, playoffs and exhibition games, so totals run higher than regular-season figures.
| Season | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1991 Atp tourUnited States | 2 | 0 | – | 0 | 4 | 15 | 26 | 2 | – | – | – |
| 1990 Atp tourUnited States | 30 | 12 | 1 | 27 | 41 | 279 | 347 | 6 | 3 | 4 | – |
| 1989 Atp tourUnited States | 47 | 25 | 1 | 60 | 54 | 525 | 502 | 9 | 6 | – | – |
| 1988 Atp tourUnited States | 38 | 21 | 1 | 45 | 40 | 407 | 385 | 10 | 2 | – | – |
| 1987 Atp tourUnited States | 15 | 6 | – | 14 | 19 | 150 | 156 | 2 | 1 | – | 1 |
| 1986 Atp tourUnited States | 29 | 11 | – | 31 | 38 | 315 | 344 | 10 | 2 | – | 1 |
| 1985 Atp tourUnited States | 45 | 26 | 3 | 58 | 47 | 497 | 471 | 8 | 3 | – | – |
| 1984 Atp tourUnited States | 9 | 4 | – | 8 | 11 | 76 | 92 | 1 | 1 | – | – |
| Career8 seasons | 215 | 105 | 6 | 243 | 254 | 2,264 | 2,323 | 48 | 18 | 4 | 2 |
| Game | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Tampa: Round of 32 v Richey RenebergL 0-2 29 Apr | 0 | – | 0 | 2 | 8 | 13 | 1 | – | – | – |
| Guaruja: Round of 32 v Martin WostenholmeL 0-2 4 Feb | 0 | – | 0 | 2 | 7 | 13 | 1 | – | – | – |
| Split | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| LossesResult | 110 | 0.0 | 0.1 | 0.3 | 2.1 | 7.6 | 13.9 | 0.2 | 0.1 | 0.0 | 0.0 |
| WinsResult | 105 | 1.0 | – | 2.0 | 0.2 | 13.6 | 7.6 | 0.3 | 0.1 | 0.0 | – |
| Regular seasonStage · won 88 of 177 | 177 | 0.5 | – | 1.1 | 1.2 | 10.6 | 10.8 | 0.2 | 0.1 | 0.0 | 0.0 |
| FinalsStage · won 17 of 38 | 38 | 0.4 | 0.2 | 1.1 | 1.2 | 10.3 | 10.6 | 0.2 | – | – | – |
| Horacio De La PenaOpponent · won 2 of 5 | 5 | 0.4 | 0.2 | 0.8 | 1.2 | 7.6 | 9.4 | 0.0 | – | – | – |
| Claudio PanattaOpponent · won 1 of 4 | 4 | 0.3 | 0.3 | 1.0 | 1.5 | 11.3 | 12.8 | 0.5 | – | – | – |
| Eliot TeltscherOpponent · won 0 of 4 | 4 | 0.0 | – | 0.3 | 2.3 | 8.0 | 15.5 | 0.3 | 0.3 | – | – |
| Ivan LendlOpponent · won 0 of 4 | 4 | 0.0 | – | 0.0 | 2.0 | 5.8 | 12.3 | 0.3 | – | – | – |
| Petr KordaOpponent · won 1 of 4 | 4 | 0.3 | – | 0.8 | 1.8 | 9.3 | 12.5 | 0.3 | 0.3 | – | – |
| Thomas MusterOpponent · won 0 of 4 | 4 | 0.0 | 0.3 | 0.0 | 2.0 | 3.3 | 12.0 | 0.0 | – | – | – |
| Franco DavinOpponent · won 1 of 3 | 3 | 0.3 | – | 1.0 | 1.7 | 9.3 | 13.3 | 0.3 | – | – | – |
| Guillermo VilasOpponent · won 3 of 3 | 3 | 1.0 | – | 2.0 | 0.7 | 15.0 | 8.3 | 0.3 | – | – | – |
| Gustavo GiussaniOpponent · won 1 of 3 | 3 | 0.3 | – | 1.0 | 1.7 | 11.3 | 15.3 | 0.7 | – | – | – |
| Jerome PotierOpponent · won 2 of 3 | 3 | 0.7 | – | 2.0 | 1.3 | 14.0 | 15.0 | 0.3 | 0.7 | – | – |
| Johan KriekOpponent · won 3 of 3 | 3 | 1.0 | – | 2.3 | 0.3 | 16.7 | 10.3 | 1.0 | 0.3 | – | – |
| Jose Francisco AlturOpponent · won 2 of 3 | 3 | 0.7 | – | 1.7 | 0.7 | 12.3 | 8.7 | 0.3 | – | – | – |
| Thierry TulasneOpponent · won 3 of 3 | 3 | 1.0 | – | 2.0 | 0.3 | 14.0 | 7.0 | 0.0 | – | – | – |
| Alberto ManciniOpponent · won 1 of 2 | 2 | 0.5 | – | 1.0 | 1.5 | 10.5 | 13.0 | 0.0 | – | – | – |
| Alberto TousOpponent · won 2 of 2 | 2 | 1.0 | – | 2.0 | 0.0 | 12.5 | 4.5 | 0.5 | – | – | – |
| Alejandro GanzabalOpponent · won 2 of 2 | 2 | 1.0 | – | 2.0 | 0.0 | 13.0 | 7.0 | 1.0 | – | – | – |
| Andres GomezOpponent · won 0 of 2 | 2 | 0.0 | – | 0.5 | 2.0 | 10.0 | 13.0 | 0.0 | – | – | – |
| Cassio MottaOpponent · won 1 of 2 | 2 | 0.5 | – | 1.0 | 1.0 | 8.5 | 7.0 | 0.0 | – | – | – |
| Christo Van RensburgOpponent · won 0 of 2 | 2 | 0.0 | – | 0.0 | 2.5 | 6.5 | 15.5 | 0.0 | – | – | – |
| Claudio MezzadriOpponent · won 2 of 2 | 2 | 1.0 | – | 2.0 | 0.0 | 12.5 | 6.5 | 0.5 | – | – | – |
| Claudio PistolesiOpponent · won 1 of 2 | 2 | 0.5 | – | 1.0 | 1.0 | 9.0 | 9.0 | 0.0 | – | – | – |
| Darren CahillOpponent · won 1 of 2 | 2 | 0.5 | – | 1.0 | 1.5 | 7.0 | 12.0 | 0.0 | 0.5 | – | – |
| Diego PerezOpponent · won 1 of 2 | 2 | 0.5 | – | 1.5 | 1.0 | 12.5 | 10.5 | 0.0 | – | – | – |
| Eduardo BengoecheaOpponent · won 1 of 2 | 2 | 0.5 | – | 1.5 | 1.0 | 12.5 | 12.0 | 0.5 | – | – | – |
| Emilio SanchezOpponent · won 0 of 2 | 2 | 0.0 | – | 0.0 | 2.0 | 3.5 | 12.0 | 0.0 | – | 0.5 | – |
| Fernando LunaOpponent · won 1 of 2 | 2 | 0.5 | – | 1.0 | 1.0 | 10.5 | 10.5 | 0.5 | – | – | – |
| Goran IvanisevicOpponent · won 1 of 2 | 2 | 0.5 | – | 1.5 | 1.0 | 12.5 | 9.0 | 0.0 | – | – | – |
| Guy ForgetOpponent · won 0 of 2 | 2 | 0.0 | – | 1.0 | 2.0 | 10.5 | 17.5 | 0.5 | – | – | – |
| Jakob HlasekOpponent · won 0 of 2 | 2 | 0.0 | – | 0.0 | 1.5 | 5.5 | 9.5 | 0.0 | – | – | 0.5 |
| Jaroslav NavratilOpponent · won 1 of 2 | 2 | 0.5 | – | 1.0 | 1.0 | 9.5 | 8.5 | 0.0 | – | – | – |
| Jay BergerOpponent · won 1 of 2 | 2 | 0.5 | 0.5 | 0.5 | 1.0 | 8.0 | 6.0 | 0.0 | – | – | – |
| Kelly EverndenOpponent · won 1 of 2 | 2 | 0.5 | – | 1.0 | 2.0 | 13.5 | 17.5 | 0.0 | 0.5 | – | – |
| Marc RossetOpponent · won 0 of 2 | 2 | 0.0 | – | 0.0 | 2.0 | 5.0 | 12.0 | 0.0 | – | – | – |
| Marcelo IngaramoOpponent · won 2 of 2 | 2 | 1.0 | – | 2.0 | 0.0 | 12.0 | 4.5 | 0.0 | – | – | – |
| Martin JaiteOpponent · won 1 of 2 | 2 | 0.5 | – | 1.0 | 1.5 | 12.5 | 13.5 | 0.5 | – | – | – |
| Pablo ArrayaOpponent · won 1 of 2 | 2 | 0.5 | – | 1.0 | 1.0 | 10.0 | 10.5 | 0.0 | – | – | – |
| Roberto ArguelloOpponent · won 1 of 2 | 2 | 0.5 | – | 1.0 | 1.0 | 9.0 | 7.5 | 0.0 | – | – | – |
| Roberto AzarOpponent · won 0 of 2 | 2 | 0.0 | – | 0.0 | 2.5 | 5.5 | 15.0 | 0.0 | 0.5 | – | – |
| Ronald AgenorOpponent · won 0 of 2 | 2 | 0.0 | – | 0.5 | 2.5 | 12.0 | 16.5 | 0.0 | 0.5 | – | – |
| Stefan SimonssonOpponent · won 0 of 2 | 2 | 0.0 | – | 0.5 | 2.0 | 9.5 | 14.0 | 0.0 | – | – | – |
| Tom NijssenOpponent · won 1 of 2 | 2 | 0.5 | – | 1.0 | 1.0 | 9.5 | 10.0 | 0.5 | – | – | – |
| Tomas CarbonellOpponent · won 1 of 2 | 2 | 0.5 | – | 1.0 | 1.0 | 9.0 | 10.0 | 0.0 | – | – | – |
| Yannick NoahOpponent · won 0 of 2 | 2 | 0.0 | – | 0.5 | 2.0 | 12.0 | 16.0 | 1.0 | – | – | – |
| Aaron KricksteinOpponent · won 1 of 1 | 1 | 1.0 | – | 2.0 | 0.0 | 13.0 | 7.0 | 0.0 | – | – | – |
| Alexandre HocevarOpponent · won 1 of 1 | 1 | 1.0 | – | 2.0 | 0.0 | 12.0 | 4.0 | 0.0 | – | – | – |
| Alvaro FillolOpponent · won 1 of 1 | 1 | 1.0 | – | 2.0 | 0.0 | 12.0 | 4.0 | 0.0 | – | – | – |
| Amos MansdorfOpponent · won 1 of 1 | 1 | 1.0 | – | 2.0 | 0.0 | 12.0 | 5.0 | 0.0 | – | – | – |
| Anders JarrydOpponent · won 0 of 1 | 1 | 0.0 | – | 0.0 | 2.0 | 6.0 | 13.0 | 0.0 | – | – | – |
| Andre AgassiOpponent · won 0 of 1 | 1 | 0.0 | – | 1.0 | 2.0 | 15.0 | 15.0 | 0.0 | – | – | – |
| Andreas MaurerOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 0.0 | 2.0 | 7.0 | 13.0 | 0.0 | – | – | – |
| Andrei ChesnokovOpponent · won 0 of 1 | 1 | 0.0 | – | 0.0 | 2.0 | 2.0 | 12.0 | 0.0 | – | – | – |
| Andres VysandOpponent · won 1 of 1 | 1 | 1.0 | – | 2.0 | 0.0 | 12.0 | 2.0 | 0.0 | – | – | – |
| Andrew SznajderOpponent · won 1 of 1 | 1 | 1.0 | – | 3.0 | 0.0 | 18.0 | 6.0 | 0.0 | 1.0 | – | – |
| Balazs TaroczyOpponent · won 0 of 1 | 1 | 0.0 | – | 1.0 | 2.0 | 13.0 | 15.0 | 0.0 | – | – | – |
| Barry MoirOpponent · won 1 of 1 | 1 | 1.0 | – | 2.0 | 0.0 | 13.0 | 8.0 | 0.0 | – | – | – |
| Bernhard PilsOpponent · won 1 of 1 | 1 | 1.0 | – | 2.0 | 0.0 | 12.0 | 5.0 | 0.0 | – | – | – |
Wins-losses for Duncan. Tap a rival for the full head to head.
Stats from official league and public sports feeds. Updated hourly. Tennis history by Jeff Sackmann / Tennis Abstract (CC BY-NC-SA 4.0).