Colin Sinclair defeated Mitchell Harper 6-4 4-6 6-2 in the M25 Cairns 1 quarter-final on hard. The upset overturned the form book — Mitchell Harper came in leading the head-to-head 1–0, but Colin Sinclair had been the form player, winning 3 of their last 7 on hard. Colin Sinclair claimed a first win over Mitchell Harper in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2022-07-28 | M15 Caloundra 2 | R16 | hard | Mitchell Harper | 3-6 6-2 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.