Kareem Allaf defeated Keenan Mayo 6-4 6-4 in the M15 Champaign 1 round of 32 on hard. The upset overturned the form book — Keenan Mayo came in leading the head-to-head 1–0, but Kareem Allaf had been the form player, winning 1 of their last 4 on hard. Kareem Allaf claimed a first win over Keenan Mayo in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-07-25 | M25 Champaign 1 | R16 | hard | Keenan Mayo | 7-5 6-7(0) 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.