[56] Kei Nishikori 7-6,6-3,6-7,2-6,6-3 Mackenzie McDonald [61] 2021-09-02 19:55
Stadium: Stadium 17 Round: 24 Ground: Hardcourt outdoor
Head to Head
| ATP Washington | 2021/08/07 22:00 | Kei Nishikori v Mackenzie McDonald | 4-6,6-3,5-7 |
| Challenger Dallas | 2018/02/04 03:10 | Kei Nishikori v Mackenzie McDonald | 6-1,6-4 |
Home History
| US Open | 2021/08/31 15:00 | Salvatore Caruso v Kei Nishikori | 1-6,1-6,7-5,3-6 |
| ATP Toronto | 2021/08/10 15:00 | Miomir Kecmanovic v Kei Nishikori | 4-6,7-6,2-6 |
| ATP Washington | 2021/08/07 22:00 | Kei Nishikori v Mackenzie McDonald | 4-6,6-3,5-7 |
| ATP Washington | 2021/08/06 23:00 | Lloyd Harris v Kei Nishikori | 3-6,5-7 |
| ATP Washington | 2021/08/05 20:35 | Kei Nishikori v Cameron Norrie | 3-6,6-3,6-3 |
| ATP Washington | 2021/08/04 21:40 | Alexander Bublik v Kei Nishikori | 2-6,5-7 |
| ATP Washington | 2021/08/02 23:00 | Kei Nishikori v Sam Querrey | 6-4,6-3 |
| Olympics 2020 - Men | 2021/07/29 09:00 | Novak Djokovic v Kei Nishikori | 6-2,6-0 |
Away History
| US Open | 2021/08/31 15:00 | Mackenzie McDonald v David Goffin | 6-2,7-5,6-3 |
| ATP Cincinnati | 2021/08/18 18:35 | Daniil Medvedev v Mackenzie McDonald | 6-2,6-2 |
| ATP Cincinnati | 2021/08/17 02:00 | Brandon Nakashima v Mackenzie McDonald | 5-7,2-6 |
| ATP Toronto | 2021/08/10 19:35 | Benoit Paire v Mackenzie McDonald | 6-3,6-4 |
| ATP Washington | 2021/08/08 21:00 | Mackenzie McDonald v Jannik Sinner | 5-7,6-4,5-7 |
| ATP Washington | 2021/08/07 22:00 | Kei Nishikori v Mackenzie McDonald | 4-6,6-3,5-7 |
| ATP Washington | 2021/08/07 01:15 | Mackenzie McDonald v Denis Kudla | 6-3,6-2 |
| ATP Washington | 2021/08/05 23:05 | Ilya Ivashka v Mackenzie McDonald | 4-6,4-6 |