Joao Sousa defeated Mikhail Kukushkin 7-6 6-2 in the St. Petersburg quarter-final on carpet. The upset overturned the form book — Mikhail Kukushkin came in leading the head-to-head 2–1, defending last year's round of 16. Joao Sousa narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-02-01 | Davis Cup QLS R1: KAZ vs POR | RR | hard | Mikhail Kukushkin | 6-4 6-1 |
| 2016-01-18 | Australian Open | R128 | hard | Joao Sousa | 6-3 6-4 6-3 |
| 2014-05-11 | Rome Masters | R64 | clay | Mikhail Kukushkin | 6-3 6-7(1) 6-3 |
Averages from each player's recent completed matches (20 vs 19). ATP, WTA & Challenger.