Kacper Cecek defeated Alexander Popp 6-2 6-3 in the USA 7 Masters 4 round of 16 on hard. The upset overturned the form book — Alexander Popp came in leading the head-to-head 1–0. Kacper Cecek claimed a first win over Alexander Popp in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-11-23 | USA F9 | QF | hard | Alexander Popp | 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.