Carolina Alves defeated Katharina Gerlach 7-6 6-1 in the W25 Rio do Sul quarter-final on clay. The upset overturned the form book — Katharina Gerlach came in leading the head-to-head 3–1, but Carolina Alves had been the form player, winning 6 of their last 8 on clay. Carolina Alves narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-10-30 | W25 Guayaquil | SF | clay | Katharina Gerlach | 5-7 6-4 6-4 |
| 2021-10-16 | W25 Lima | SF | clay | Katharina Gerlach | 7-6(3) 6-1 |
| 2021-03-26 | W25 Buenos Aires | R16 | clay | Carolina Alves | 6-4 6-1 |
| 2019-11-07 | W60 Colina | R16 | clay | Katharina Gerlach | 7-6(2) 4-6 7-5 |
Averages over each player's completed matches in the selected window (200 vs 96). 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