Milos Raonic defeated Lukas Lacko 6-3 6-3 in the Tokyo quarter-final on hard. The upset overturned the form book — Lukas Lacko came in leading the head-to-head 1–0, defending last year's round of 16, but Milos Raonic had been the form player, winning 2 of their last 4 on hard. Milos Raonic claimed a first win over Lukas Lacko in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-01-15 | Australian Open | R128 | hard | Lukas Lacko | 6-7(5) 7-5 6-4 7-6(4) |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.