| WTA Toronto WD | 08/11 18:45 | 29 | Krejcikova/Siniakova v Groenefeld/Schuurs | 7-5,6-0 | |
| WTA Toronto WD | 08/10 19:30 | 28 | Krejcikova/Siniakova v Azarenka/Barty | 3-6,6-3,10-4 | |
| WTA Toronto WD | 08/08 19:35 | 27 | Krejcikova/Siniakova v Kichenok/Spears | 6-1,6-1 | |
| WTA Toronto WD | 08/07 21:00 | 26 | Krejcikova/Siniakova v Olaru/Yang | Walkover | |
| Wimbledon Women WD | 07/12 12:00 | 28 | Dabrowski/Yifan Xu v Krejcikova/Siniakova | 6-1,3-6,6-3 | |
| Wimbledon Women WD | 07/10 10:00 | 27 | Groenefeld/Schuurs v Krejcikova/Siniakova | 2-6,6-7 | |
| Wimbledon Women WD | 07/08 15:15 | 26 | Friedsam/Siegemund v Krejcikova/Siniakova | 6-7,1-6 | |
| Wimbledon Women WD | 07/05 12:20 | 25 | Sasnovich/Tsurenko v Krejcikova/Siniakova | Retired | |
| Wimbledon Women WD | 07/03 11:40 | 24 | Bains/Broady v Krejcikova/Siniakova | 5-7,1-6 | |
| French Open Women WD | 05/30 15:20 | 24 | Krejcikova/Siniakova v Kichenok/Spears | 2-6,4-6 | |
| WTA Rome WD | 05/18 14:00 | 28 | Krejcikova/Siniakova v Azarenka/Barty | 4-6,4-6 | |
| WTA Rome WD | 05/17 12:00 | 27 | Krejcikova/Siniakova v Aoyama/Marozava | 6-4,7-5 | |
| WTA Rome WD | 05/16 18:20 | 26 | Krejcikova/Siniakova v Kudermetova/Zvonareva | 1-6,6-3,10-7 | |
| WTA Madrid WD | 05/09 12:30 | 27 | Krejcikova/Siniakova v Dabrowski/Yifan Xu | 6-3,6-7,7-10 | |
| WTA Madrid WD | 05/08 13:50 | 26 | Krejcikova/Siniakova v Begu/Halep | 6-3,6-3 | |
| WTA Miami WD | 03/23 22:00 | 25 | Krejcikova/Siniakova v Azarenka/Barty | 3-6,7-6,7-10 | |
| WTA Indian Wells WD | 03/16 22:00 | 29 | Krejcikova/Siniakova v Mertens/Sabalenka | 3-6,2-6 | |
| WTA Indian Wells WD | 03/14 19:00 | 28 | Krejcikova/Siniakova v Chan/Chan | 5-7,7-6,10-6 | |
| WTA Indian Wells WD | 03/13 18:00 | 27 | Krejcikova/Siniakova v Bertens/Vekic | 6-1,7-6 | |
| WTA Indian Wells WD | 03/11 18:00 | 26 | Krejcikova/Siniakova v Rosolska/Yang | 7-6,4-6,10-7 | |
| WTA Indian Wells WD | 03/07 20:30 | 25 | Krejcikova/Siniakova v Barty/Garcia | 6-2,7-5 | |
| 2019 Fed Cup | 02/10 16:55 | 27 | Krejcikova/Siniakova v Begu/Niculescu | 7-6,4-6,4-6 | |
| Australian Open Women WD | 01/22 00:00 | 27 | Krejcikova/Siniakova v Stosur/Zhang | 6-7,6-7 | |
| Australian Open Women WD | 01/21 02:55 | 26 | Krejcikova/Siniakova v Mertens/Sabalenka | 2-6,6-2,6-3 | |
| Australian Open Women WD | 01/18 03:00 | 25 | Krejcikova/Siniakova v Adamczak/Moore | 6-4,6-4 | |
| Australian Open Women WD | 01/16 05:00 | 24 | Krejcikova/Siniakova v Bogdan/Rodionova | 6-2,6-2 | |
| WTA Brisbane WD | 01/04 02:00 | 28 | Krejcikova/Siniakova v Melichar/Peschke | 2-6,5-7 | |
| WTA Brisbane WD | 01/03 01:30 | 27 | Krejcikova/Siniakova v Hradecka/Klepac | 6-3,6-2 | |
| WTA Brisbane WD | 01/01 05:45 | 26 | Krejcikova/Siniakova v Buzarnescu/Kichenok | 6-4,6-0 | |
| WTA Finals WD | 10/28 08:00 | 29 | Krejcikova/Siniakova v Babos/Mladenovic | 4-6,5-7 |