
Mona Barthel defeated Lin Zhu 5-7 6-2 6-4 in the Chicago round of 32 on hard. The upset overturned the form book — Lin Zhu came in ranked #138, but Mona Barthel had been the form player, winning 4 of their last 5 on hard. Mona Barthel extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-06-28 | Wimbledon | R128 | grass | Lin Zhu | 6-7(2) 6-3 6-3 |
| 2019-03-04 | Indian Wells | R128 | hard | Mona Barthel | 6-4 6-7(4) 7-5 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.