 USA: US Open - Doubles - Main |
|---|
| 1/32-finals | Burgin E./Fairbank-Nideffer R. | Barg-Mager P./Louie Harper P. | 2:0 (6:2, 6:3) | dettagli | 27.08.1990 |
| USA: Los Angeles - Doubles - Main |
|---|
| 1/16-finals | Louie Harper P./Barg-Mager P. | Gregory L./Rush G. | 0:2 (6:7, 4:6) | dettagli | 13.08.1990 |
 Canada: Montreal - Doubles - Main |
|---|
| 1/16-finals | Durie J./Richardson J. | Barg-Mager P./Phelps T. | 2:1 (4:6, 7:5, 6:1) | dettagli | 30.07.1990 |
 United Kingdom: Wimbledon - Doubles - Main |
|---|
| 1/16-finals | Gregory L./Rush G. | Louie Harper P./Barg-Mager P. | 2:0 (6:4, 6:1) | dettagli | 01.07.1990 |
| 1/32-finals | Bollegraf M./Cordwell B. | Louie Harper P./Barg-Mager P. | 0:2 (5:7, 4:6) | dettagli | 30.06.1990 |
| United Kingdom: Eastbourne - Doubles - Main |
|---|
| 1/16-finals | Borneo B./Wood C. | Louie Harper P./Barg-Mager P. | 2:0 (6:4, 6:3) | dettagli | 18.06.1990 |
| United Kingdom: Birmingham - Doubles - Main |
|---|
| 1/16-finals | Barnard L./Field L. | Barg-Mager P./Stafford-Beckish S. | 2:0 (7:5, 6:4) | dettagli | 11.06.1990 |
 France: French Open - Mixed Doubles - Main |
|---|
| 1/32-finals | Woodbridge T./McQuillan R. | Warder L./Barg-Mager P. | 2:0 (6:3, 6:2) | dettagli | 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) | dettagli | 28.05.1990 |
| USA: Tampa - Doubles - Main |
|---|
| Semi-finals | Paz M./Sanchez-Vicario A. | Barg-Mager P./Louie Harper P. | 2:0 (6:4, 6:2) | dettagli | 21.04.1990 |
| Quarter-finals | Barg-Mager P./Louie Harper P. | Castro G./Martinez C. | 2:0 (6:3, 6:3) | dettagli | 18.04.1990 |
| 1/8-finals | Barg-Mager P./Louie Harper P. | Ferrando L./La Fratta S. | 2:0 (6:3, 6:3) | dettagli | 16.04.1990 |
| USA: Amelia Island - Doubles - Main |
|---|
| Quarter-finals | Rajchrtova R./Temesvari A. | Barg-Mager P./Meskhi L. | 2:0 (6:4, 6:3) | dettagli | 13.04.1990 |
| 1/8-finals | Faber D./Kelesi H. | Barg-Mager P./Meskhi L. | 0:2 (1:6, 3:6) | dettagli | 11.04.1990 |
| USA: Hilton Head - Doubles - Main |
|---|
| Quarter-finals | Barg-Mager P./Phelps T. | Paz M./Zvereva N. | 1:2 (4:6, 7:6, 2:6) | dettagli | 06.04.1990 |
| 1/8-finals | Cecchini S./Tarabini P. | Barg-Mager P./Phelps T. | 1:2 (6:3, 3:6, 3:6) | dettagli | 04.04.1990 |
| 1/16-finals | Barg-Mager P./Phelps T. | Castro G./Martinez C. | 2:0 (6:3, 6:3) | dettagli | 02.04.1990 |
| USA: Miami - Doubles - Main |
|---|
| 1/8-finals | Barg-Mager P./Louie Harper P. | Burgin E./Fairbank-Nideffer R. | 0:2 (2:6, 3:6) | dettagli | 20.03.1990 |
| 1/16-finals | Barg-Mager P./Louie Harper P. | Phelps T./Probst W. | 2:0 (7:6, 6:1) | dettagli | 18.03.1990 |
| USA: Boca Raton - Doubles - Main |
|---|
| 1/8-finals | Novotna J./Sukova H. | Barg-Mager P./Louie Harper P. | 2:0 (6:2, 6:4) | dettagli | 07.03.1990 |
| 1/16-finals | Barg-Mager P./Louie Harper P. | Amiach S./Pierce M. | 2:0 (6:3, 6:1) | dettagli | 05.03.1990 |
| USA: Indian Wells - Doubles - Main |
|---|
| 1/8-finals | Louie Harper P./Barg-Mager P. | Bradtke-Provis N./Reinach E. | 0:2 (4:6, 4:6) | dettagli | 28.02.1990 |
| 1/16-finals | Louie Harper P./Barg-Mager P. | Leand A./Loosemore S. | 2:0 (6:2, 6:4) | dettagli | 26.02.1990 |
| USA: Chicago - Doubles - Main |
|---|
| 1/8-finals | Barg-Mager P./Louie Harper P. | Daniels M./Prausa W. | 1:2 (7:6, 1:6, 6:7) | dettagli | 12.02.1990 |
| USA: Wichita - Doubles - Main |
|---|
| Quarter-finals | Barg-Mager P./Louie Harper P. | Bradtke-Provis N./White A. | 1:2 (6:4, 2:6, 3:6) | dettagli | 07.02.1990 |
| 1/8-finals | Barg-Mager P./Louie Harper P. | Foxworth K./Whittington T. | 2:0 (6:3, 7:5) | dettagli | 05.02.1990 |
