Nikolay Sysoev defeated Joshua Sheehy 6-7 7-6 12-10 in the M15 Cancun 2 q64 on hard. The upset overturned the form book — Joshua Sheehy came in leading the head-to-head 1–0, but Nikolay Sysoev had been the form player, winning 4 of their last 8 on hard. Nikolay Sysoev claimed a first win over Joshua Sheehy in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-07-19 | M15 Monastir 27 | Q32 | hard | Joshua Sheehy | 6-2 6-1 |
Averages over each player's completed matches in the selected window (13 vs 176). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About