M. Mbithi defeated Jean Thirouin 2-6 6-1 6-1 in the M15 Cancun 20 round of 16 on hard. The upset overturned the form book — Jean Thirouin came in leading the head-to-head 1–0. M. Mbithi claimed a first win over Jean Thirouin in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-08-03 | M15 Cancun 18 | SF | hard | Jean Thirouin | 6-3 7-6(5) |