 USA: Miami - Doubles - Main |
|---|
| 1/16-finals | Hsieh S-W./Strycova B. | Christian K./Muhammad A. | 2:0 (7:5, 7:5) | details | 24.03.2019 |
| USA: Indian Wells - Doubles - Main |
|---|
| Quarter-finals | Christian K./Muhammad A. | Mertens E./Sabalenka A. | 0:2 (1:6, 3:6) | details | 13.03.2019 |
| 1/8-finals | Christian K./Muhammad A. | Muguruza G./Suarez Navarro C. | WO. | details | 10.03.2019 |
| 1/16-finals | Klepac A./Martinez Sanchez M. J. | Christian K./Muhammad A. | 0:2 (4:6, 3:6) | details | 06.03.2019 |
 Australia: Australian Open - Doubles - Main |
|---|
| 1/8-finals | Christian K./Muhammad A. | Klepac A./Martinez Sanchez M. J. | 0:2 (2:6, 2:6) | details | 20.01.2019 |
| 1/16-finals | Aoyama S./Marozava L. | Christian K./Muhammad A. | 0:2 (5:7, 5:7) | details | 18.01.2019 |
| 1/32-finals | Chang K-C./Hsu Ch.-W. | Christian K./Muhammad A. | 0:2 (1:6, 2:6) | details | 16.01.2019 |
 New Zealand: Auckland - Doubles - Main |
|---|
| 1/8-finals | Adamczak M./Moore J. | Christian K./Muhammad A. | 2:1 (3:6, 6:3, 12:10) | details | 01.01.2019 |
