Juan Martin del Potro defeated Mikhail Kukushkin 6-2 6-1 6-2 in the Davis Cup WG QF: ARG vs KAZ round robin on clay. The upset overturned the form book — Mikhail Kukushkin came in leading the head-to-head 1–0. Juan Martin del Potro claimed a first win over Mikhail Kukushkin in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-01-11 | Sydney | QF | hard | Mikhail Kukushkin | 7-6(5) 7-6(3) |
Averages from each player's recent completed matches (20 vs 19). ATP, WTA & Challenger.