 USA: US Open - Doubles - Main |
|---|
| 1/32-finals | De Lone E./Raymond L. | Phelps T./Stafford-Beckish S. | 2:1 (3:6, 6:3, 6:3) | details | 27.08.1990 |
| USA: San Diego - Doubles - Main |
|---|
| 1/8-finals | Burgin E./Fairbank-Nideffer R. | Mager P./Phelps T. | 2:0 (7:6, 6:3) | details | 06.08.1990 |
 Canada: Montreal - Doubles - Main |
|---|
| 1/16-finals | Durie J./Richardson J. | Barg-Mager P./Phelps T. | 2:1 (4:6, 7:5, 6:1) | details | 30.07.1990 |
 United Kingdom: Wimbledon - Doubles - Main |
|---|
| 1/16-finals | Herr B./Phelps T. | Burgin E./Fairbank-Nideffer R. | 0:2 (3:6, 4:6) | details | 01.07.1990 |
| United Kingdom: Wimbledon - Mixed Doubles - Main |
|---|
| 1/16-finals | Broad N./Phelps T. | Nijssen T./Bollegraf M. | 0:2 (3:6, 2:6) | details | 01.07.1990 |
| United Kingdom: Wimbledon - Doubles - Main |
|---|
| 1/32-finals | Kidowaki M./Scott A. | Herr B./Phelps T. | 0:2 (3:6, 3:6) | details | 30.06.1990 |
| United Kingdom: Wimbledon - Mixed Doubles - Main |
|---|
| 1/32-finals | Broad N./Phelps T. | DeVries S./Mager P. | 2:0 (6:4, 7:5) | details | 27.06.1990 |
| United Kingdom: Birmingham - Doubles - Main |
|---|
| 1/16-finals | Golarsa L./Tauziat N. | Herr B./Phelps T. | 2:1 (6:2, 5:7, 7:5) | details | 11.06.1990 |
 France: French Open - Doubles - Main |
|---|
| 1/16-finals | Phelps T./Stafford-Beckish S. | Gregory L./Rush G. | 1:2 (1:6, 7:67, 2:6) | details | 31.05.1990 |
| France: French Open - Mixed Doubles - Main |
|---|
| 1/32-finals | Jensen L./Phelps T. | Luza G./Tarabini P. | 0:2 (2:6, 5:7) | details | 28.05.1990 |
| France: French Open - Doubles - Main |
|---|
| 1/32-finals | Barg-Mager P./Herr B. | Phelps T./Stafford-Beckish S. | 1:2 (1:6, 6:4, 3:6) | details | 28.05.1990 |
 Switzerland: Geneva - Doubles - Main |
|---|
| Semi-finals | Burgin E./Nagelsen B. | Phelps T./Stafford-Beckish S. | 2:0 (6:1, 6:3) | details | 26.05.1990 |
| Quarter-finals | Caverzasio C./Garrone L. | Phelps T./Stafford-Beckish S. | 1:2 (6:3, 2:6, 4:6) | details | 23.05.1990 |
| 1/8-finals | Paulus B./Zrubakova R. | Phelps T./Stafford-Beckish S. | 0:2 (3:6, 5:7) | details | 21.05.1990 |
| USA: Hilton Head - Doubles - Main |
|---|
| Quarter-finals | Barg-Mager P./Phelps T. | Paz M./Zvereva N. | 1:2 (4:6, 7:6, 2:6) | details | 06.04.1990 |
| 1/8-finals | Cecchini S./Tarabini P. | Barg-Mager P./Phelps T. | 1:2 (6:3, 3:6, 3:6) | details | 04.04.1990 |
| 1/16-finals | Barg-Mager P./Phelps T. | Castro G./Martinez C. | 2:0 (6:3, 6:3) | details | 02.04.1990 |
| USA: Miami - Doubles - Main |
|---|
| 1/16-finals | Barg-Mager P./Louie Harper P. | Phelps T./Probst W. | 2:0 (7:6, 6:1) | details | 18.03.1990 |
| 1/32-finals | Phelps T./Probst W. | Camille B./Schimper K. | 2:1 (4:6, 6:4, 6:1) | details | 16.03.1990 |
| USA: Boca Raton - Doubles - Main |
|---|
| 1/8-finals | Phelps T./Stafford-Beckish S. | Cordwell B./Durie J. | 0:2 (3:6, 2:6) | details | 07.03.1990 |
| 1/16-finals | Phelps T./Stafford-Beckish S. | Corsato-Owsianka L./Spadea-Nachmann L. | 2:0 (6:1, 6:4) | details | 05.03.1990 |
| USA: Indian Wells - Doubles - Main |
|---|
| 1/8-finals | Phelps T./Stafford-Beckish S. | Demongeot I./Pfaff E. | 0:2 (3:6, 6:7) | details | 28.02.1990 |
| 1/16-finals | Phelps T./Stafford-Beckish S. | Herreman N./Wiesner J. | 2:0 (6:4, 6:3) | details | 26.02.1990 |
 Japan: Tokyo - Doubles - Main |
|---|
| 1/8-finals | Louie Harper P./MacGregor C. | Phelps T./Minter A. | 2:0 (7:6, 6:3) | details | 29.01.1990 |
 Australia: Australian Open - Mixed Doubles - Main |
|---|
| 1/16-finals | Castle A./Reggi R. | Jensen L./Phelps T. | 2:0 (6:2, 6:4) | details | 15.01.1990 |
