Guido Pella defeated Sam Querrey 7-5 6-7 7-6 in the Geneva round of 16 on clay. The upset overturned the form book — Sam Querrey came in leading the head-to-head 2–1, defending last year's quarter-final. Guido Pella narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-09-24 | Chengdu | R32 | hard | Sam Querrey | 7-6(6) 6-1 |
| 2018-04-09 | Houston | R16 | clay | Guido Pella | 2-6 7-6(4) 7-6(3) |
| 2013-08-26 | US Open | R128 | hard | Sam Querrey | 7-6(3) 4-6 6-1 6-2 |
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 (185 vs 145). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About