Lukas Lacko defeated Denis Istomin 5-7 6-1 6-4 in the Atlanta round of 16 on hard. The upset overturned the form book — Denis Istomin came in leading the head-to-head 3–1, defending last year's quarter-final, but Lukas Lacko had been the form player, winning 1 of their last 5 on hard. Lukas Lacko narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-07-22 | Atlanta | R32 | hard | Denis Istomin | 6-1 6-3 |
| 2010-08-22 | New Haven | R16 | hard | Denis Istomin | 6-2 2-6 6-3 |
| 2010-02-01 | Zagreb | R32 | hard | Lukas Lacko | 6-2 2-2 RET |
| 2008-01-14 | Australian Open | R128 | hard | Denis Istomin | 6-3 6-7(1) 7-6(4) 6-1 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (200 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About