[78] Mackenzie McDonald 6-4,3-6,4-6 Tennys Sandgren [61] 2018-10-27 15:30
Stadium: Court 2 Round: 45 Ground: Hardcourt indoor
Head to Head
| Challenger Fairfield | 2017/10/13 19:50 | Mackenzie McDonald v Tennys Sandgren | 7-6,6-2 |
| Challenger Tiburon | 2017/09/30 21:25 | Mackenzie McDonald v Tennys Sandgren | 6-7,6-7 |
| Challenger Aptos | 2017/08/09 21:50 | Mackenzie McDonald v Tennys Sandgren | 1-6,2-6 |
| Challenger Savannah | 2017/05/01 23:10 | Tennys Sandgren v Mackenzie McDonald | 6-4,3-6,6-4 |
| Challenger Leon | 2017/03/29 20:45 | Tennys Sandgren v Mackenzie McDonald | 2-6,7-6,6-3 |
| Challenger Cary | 2016/09/13 16:00 | Tennys Sandgren v Mackenzie McDonald | 6-4,6-3 |
Home History
| ATP Basel | 2018/10/21 12:00 | Alexei Popyrin v Mackenzie McDonald | 6-4,4-6,6-4 |
| ATP Basel | 2018/10/20 13:40 | Marcel Granollers v Mackenzie McDonald | 2-6,4-6 |
| ATP Antwerp | 2018/10/17 10:00 | Gilles Simon v Mackenzie McDonald | 6-1,6-1 |
| ATP Antwerp | 2018/10/15 15:00 | Mackenzie McDonald v Nicolas Jarry | 6-1,7-6 |
| ATP Shanghai | 2018/10/10 09:40 | Roberto Bautista-Agut v Mackenzie McDonald | 3-6,6-4,6-1 |
| ATP Shanghai | 2018/10/08 08:15 | Mackenzie McDonald v Milos Raonic | 6-3,5-7,6-3 |
| ATP Shanghai | 2018/10/07 06:20 | Radu Albot v Mackenzie McDonald | 6-2,3-6,1-6 |
| ATP Shanghai | 2018/10/06 06:45 | Evgeny Donskoy v Mackenzie McDonald | 3-6,4-6 |
Away History
| ATP Stockholm | 2018/10/19 19:10 | John Isner v Tennys Sandgren | 7-6,6-7,7-6 |
| ATP Stockholm | 2018/10/18 10:00 | Oscar Otte v Tennys Sandgren | 6-7,6-3,3-6 |
| ATP Stockholm | 2018/10/16 12:40 | Tennys Sandgren v Lucas Pouille | 6-4,6-4 |
| ATP Shanghai | 2018/10/06 04:00 | Tennys Sandgren v Bradley Klahn | 6-4,3-6,4-6 |
| ATP Beijing | 2018/10/02 06:30 | Tennys Sandgren v Grigor Dimitrov | 5-7,3-6 |
| ATP Beijing | 2018/09/30 04:30 | Tennys Sandgren v Vasek Pospisil | 6-7,2-6 |
| ATP Beijing | 2018/09/29 05:05 | Tennys Sandgren v Ramkumar Ramanathan | 6-1,6-2 |
| ATP Chengdu | 2018/09/25 09:55 | Mikhail Kukushkin v Tennys Sandgren | 6-4,6-3 |