 World: Billie Jean King Cup - Group II - Doubles - Relegation |
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| | Williford K./Zamburek A. C. | Clarke S./Pratt B. | CAN. | details | 29.07.2023 |
| World: Billie Jean King Cup - Group II - Doubles - Main |
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| | De Santa Ana L./Licht T. | Williford K./Zamburek A. C. | CAN. | details | 28.07.2023 |
| | Williford K./Zamburek A. C. | Reasco Gonzalez M. E./Romero C. | 0:2 (3:6, 5:7) | details | 28.07.2023 |
| | Williford K./Zamburek A. C. | Espinal Sanchez N. G./Obando D. | 1:2 (7:5, 3:6, 4:6) | details | 27.07.2023 |
 Dominican Republic: W25 Santo Domingo 3 - Doubles - Main |
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| 1/8-finals | Bowers A./Gell M. | Williford K./Zamburek A. C. | 2:0 (6:3, 7:5) | details | 21.06.2023 |
| World: Billie Jean King Cup - Group II - Doubles - Promotion |
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| | Williford K./Zamburek A. C. | Castedo M. O./Zeballos N. | CAN. | details | 31.07.2022 |
| Dominican Republic: W25 Santo Domingo 4 - Doubles - Main |
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| Quarter-finals | Kuwata H./Lee P.-C. | Lincer O./Zamburek A. C. | 2:0 (6:2, 6:1) | details | 16.06.2022 |
| 1/8-finals | Carrera S./Valdez R. | Lincer O./Zamburek A. C. | 0:2 (0:6, 3:6) | details | 14.06.2022 |
| Dominican Republic: W25 Santo Domingo 3 - Doubles - Main |
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| 1/8-finals | Lincer O./Zamburek A. C. | Hitt Z./Monroy Y. | 1:2 (6:3, 2:6, 9:11) | details | 07.06.2022 |
| Dominican Republic: W25 Santo Domingo 2 - Doubles - Main |
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| Final | Bektas E./Gleason Q. | Williford K./Zamburek A. C. | 2:0 (7:5, 6:4) | details | 12.06.2021 |
| Semi-finals | Williford K./Zamburek A. C. | Contreras Gomez F./Lemaitre T. | 2:1 (6:2, 3:6, 10:6) | details | 11.06.2021 |
| Quarter-finals | Williford K./Zamburek A. C. | Appel M./Lincer O. | 2:1 (6:3, 5:7, 10:8) | details | 10.06.2021 |
| 1/8-finals | Williford K./Zamburek A. C. | Mandlik E./Mateas M. | WO. | details | 10.06.2021 |
| Dominican Republic: W25 Santo Domingo - Doubles - Main |
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| 1/8-finals | Alves C./Gamarra Martins I. | Williford K./Zamburek A. C. | 2:0 (6:2, 6:4) | details | 01.06.2021 |