Niki Kaliyanda Poonacha defeated Nick Chappell 7-6 7-6 in the San Luis Potosi CH qualifying round 1 on clay. The upset overturned the form book — Nick Chappell came in leading the head-to-head 1–0, defending last year's round of 32. Niki Kaliyanda Poonacha claimed a first win over Nick Chappell in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-10-28 | M15 Davangere 1 | SF | hard | Nick Chappell | 6-3 6-2 |
Averages over each player's completed matches in the selected window (18 vs 59). 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