[257] Jack Sock 6-7,3-6 Christian Harrison [327] 2021-04-16 15:00
Stadium: Court 1 Round: 27 Ground: Hardcourt outdoor
Home History
| Challenger Orlando | 2021/04/15 16:30 | Prajnesh Gunneswaran v Jack Sock | 3-6,4-6 |
| Challenger Orlando | 2021/04/13 17:40 | Yosuke Watanuki v Jack Sock | 1-6,1-6 |
| Challenger Lugano | 2021/03/25 15:35 | Roman Safiullin v Jack Sock | 6-4,6-3 |
| Challenger Lugano | 2021/03/23 14:15 | Jack Sock v Antoine Bellier | 6-4,6-3 |
| Challenger Biella | 2021/03/17 10:00 | Jack Sock v Andreas Seppi | 6-4,3-6,3-6 |
| Challenger Biella | 2021/03/15 12:05 | Akira Santillan v Jack Sock | 4-6,6-3,7-6 |
| Challenger Biella Qual | 2021/03/14 12:40 | Johan Nikles v Jack Sock | 7-6,3-6,1-6 |
| Challenger St. Petersburg | 2021/03/12 11:00 | Kacper Zuk v Jack Sock | 6-3,6-2 |
Away History
| Challenger Orlando | 2021/04/15 14:00 | Aleksandar Kovacevic v Christian Harrison | 4-6,3-6 |
| Challenger Orlando | 2021/04/13 14:00 | Christian Harrison v Mackenzie McDonald | 7-5,6-3 |
| ITF M25 Naples | 2021/02/28 16:00 | Christian Harrison v Corentin Denolly | 6-4,6-2 |
| ITF M25 Naples | 2021/02/27 16:20 | Christian Harrison v Cristian Rodriguez | 6-3,4-6,6-2 |
| ITF M25 Naples | 2021/02/26 18:55 | Mitchell Krueger v Christian Harrison | 6-7,6-4,5-7 |
| ITF M25 Naples | 2021/02/25 14:55 | Zane Khan v Christian Harrison | 7-6,3-6,5-7 |
| ITF M25 Naples | 2021/02/24 18:25 | Mark Whitehouse v Christian Harrison | 4-6,4-6 |
| ITF M25 Naples | 2021/02/21 16:00 | Clement Tabur v Christian Harrison | 6-1,1-6,6-3 |