Colin Sinclair defeated Luca Castelnuovo 6-1 6-2 in the Guangzhou CH round of 32 on hard. Colin Sinclair extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-06-28 | M15 Maanshan 3 | SF | hard | Luca Castelnuovo | 7-6(6) 6-4 |
| 2020-12-09 | M15 Monastir 20 | R32 | hard | Colin Sinclair | 5-3 |
Averages over each player's completed matches in the selected window (154 vs 168). 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