Russia: Moscow - Doubles - Main |
| 1/8-finals | Jurak D./Olaru R. | Christian K./Santamaria S. | 2:0 (6:3, 6:1) | details | 15.10.2018 |
China: Wuhan - Doubles - Main |
| 1/8-finals | Babos T./Mladenovic K. | Christian K./Santamaria S. | 2:0 (6:2, 6:2) | details | 26.09.2018 |
| 1/16-finals | Christian K./Santamaria S. | Konta J./Zhang S. | 2:0 (6:2, 6:1) | details | 25.09.2018 |
China: Guangzhou - Doubles - Main |
| Semi-finals | Christian K./Santamaria S. | Adamczak M./Moore J. | 1:2 (0:6, 6:3, 10:12) | details | 21.09.2018 |
| Quarter-finals | Christian K./Santamaria S. | Lu J./Namigata J. | 2:0 (6:3, 6:4) | details | 20.09.2018 |
| 1/8-finals | Christian K./Santamaria S. | Gumulya B./Veselinovic A. | 2:0 (6:2, 6:2) | details | 19.09.2018 |
Canada: Quebec City - Doubles - Main |
| 1/8-finals | Christian K./Santamaria S. | Hradecka L./Krajicek M. | 0:2 (2:6, 4:6) | details | 12.09.2018 |
USA: Chicago - Doubles - Main |
| Quarter-finals | Christian K./Santamaria S. | Muhammad A./Sanchez M. | 1:2 (6:3, 4:6, 3:10) | details | 06.09.2018 |
| 1/8-finals | Christian K./Santamaria S. | Blinkova A./Voskoboeva G. | 2:1 (4:6, 6:2, 10:4) | details | 04.09.2018 |
USA: Cincinnati - Doubles - Main |
| Semi-finals | Mertens E./Schuurs D. | Christian K./Santamaria S. | 2:0 (6:1, 6:4) | details | 18.08.2018 |
| Quarter-finals | Klepac A./Martinez Sanchez M. J. | Christian K./Santamaria S. | 0:2 (62:7, 2:6) | details | 17.08.2018 |
| 1/8-finals | Han X.Y./Jurak D. | Christian K./Santamaria S. | 1:2 (6:1, 1:6, 7:10) | details | 17.08.2018 |
| 1/16-finals | Christian K./Santamaria S. | Begu I./Niculescu M. | 2:0 (7:5, 7:5) | details | 14.08.2018 |
USA: San Jose - Doubles - Main |
| 1/8-finals | Christian K./Santamaria S. | Kichenok L./Kichenok N. | 1:2 (6:4, 3:6, 7:10) | details | 02.08.2018 |
Spain: Mallorca - Doubles - Main |
| Quarter-finals | Christian K./Santamaria S. | Safarova L./Stefkova B. | 0:2 (4:6, 3:6) | details | 22.06.2018 |
| 1/8-finals | Christian K./Santamaria S. | Azarenka V./Kuznetsova S. | 2:0 (6:2, 6:3) | details | 18.06.2018 |
Netherlands: Hertogenbosch - Doubles - Main |
| 1/8-finals | Mertens E./Schuurs D. | Christian K./Santamaria S. | 2:0 (6:3, 6:3) | details | 11.06.2018 |
Croatia: Bol - Doubles - Main |
| Semi-finals | Soler-Espinosa S./Stefkova B. | Christian K./Santamaria S. | 2:1 (6:2, 65:7, 10:5) | details | 08.06.2018 |
| Quarter-finals | Komardina A./Minella M. | Christian K./Santamaria S. | 1:2 (4:6, 6:1, 0:10) | details | 07.06.2018 |
| 1/8-finals | Husaric A./Laine E. | Christian K./Santamaria S. | 1:2 (2:6, 7:5, 6:10) | details | 05.06.2018 |
Germany: Nurnberg - Doubles - Main |
| 1/8-finals | Christian K./Santamaria S. | Jurak D./Lister C. E. | 0:2 (63:7, 3:6) | details | 21.05.2018 |
Morocco: Rabat - Doubles - Main |
| 1/8-finals | Christian K./Santamaria S. | Rosolska A./Spears A. | 0:2 (3:6, 2:6) | details | 01.05.2018 |
Colombia: Bogota - Doubles - Main |
| 1/8-finals | Christian K./Santamaria S. | Bonaventure Y./Rodriguez V. | 0:2 (3:6, 2:6) | details | 09.04.2018 |
Mexico: Monterrey - Doubles - Main |
| 1/8-finals | Christian K./Santamaria S. | Krawczyk D./Olmos G. | 1:2 (3:6, 7:64, 4:10) | details | 03.04.2018 |
Mexico: Acapulco - Doubles - Main |
| Final | Christian K./Santamaria S. | Maria T./Watson H. | 1:2 (5:7, 6:2, 2:10) | details | 03.03.2018 |
| Semi-finals | Christian K./Santamaria S. | Puig M./Stephens S. | 2:0 (6:4, 6:4) | details | 03.03.2018 |
| Quarter-finals | Smith A./Voracova R. | Christian K./Santamaria S. | 0:2 (4:6, 5:7) | details | 02.03.2018 |
| 1/8-finals | Cako J./Geuer N. | Christian K./Santamaria S. | 0:2 (3:6, 4:6) | details | 01.03.2018 |
USA: Newport Beach - Doubles - Main |
| Semi-finals | Loeb J./Peterson R. | Christian K./Santamaria S. | 2:1 (3:6, 6:4, 10:7) | details | 27.01.2018 |
| Quarter-finals | Day K./Dolehide C. | Christian K./Santamaria S. | 0:2 (3:6, 3:6) | details | 25.01.2018 |
| 1/8-finals | Bonic B./Muchova K. | Christian K./Santamaria S. | 1:2 (7:5, 2:6, 3:10) | details | 24.01.2018 |
USA: Carlsbad - Doubles - Main |
| Quarter-finals | Glushko J./Peterson R. | Christian K./Santamaria S. | 2:0 (6:4, 6:3) | details | 24.11.2015 |
USA: US Open - Doubles - Main |
| 1/32-finals | Hingis M./Mirza S. | Christian K./Santamaria S. | 2:0 (6:1, 6:2) | details | 04.09.2015 |