Stadium: 1573 Arena Round: 25 Ground: Hardcourt outdoor
| US Open XD | 2019/09/03 02:05 | Chan/Venus v Koolhof/Peschke | 6-3,7-6 |
| US Open XD | 2019/08/31 20:30 | Duan/Demoliner v Koolhof/Peschke | 5-7,6-4,7-10 |
| US Open XD | 2019/08/30 20:45 | McHale/Harrison v Koolhof/Peschke | 4-6,6-3,11-13 |
| Wimbledon XD | 2019/07/12 16:00 | Koolhof/Peschke v Chan/Dodig | 5-7,4-6 |
| Wimbledon XD | 2019/07/11 13:15 | Koolhof/Peschke v Sitak/Siegemund | 6-1,6-2 |
| Wimbledon XD | 2019/07/10 11:25 | Koolhof/Peschke v Kichenok/Qureshi | 7-6,6-4 |
| Wimbledon XD | 2019/07/06 17:15 | Koolhof/Peschke v Oswald/Adamczak | 6-1,6-4 |
| French Open XD | 2019/05/29 16:55 | Olaru/Skugor v Koolhof/Peschke | 6-3,4-6,10-7 |