Sam Querrey defeated Stan Wawrinka 6-3 7-6 in the Beijing round of 16 on hard. The upset overturned the form book — Stan Wawrinka came in leading the head-to-head 5–1. Sam Querrey narrowed the head-to-head to 5–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-06-18 | Queen's Club | R16 | grass | Sam Querrey | 7-5 6-7(3) 6-1 |
| 2017-05-22 | Geneva | QF | clay | Stan Wawrinka | 4-6 7-5 6-2 |
| 2014-06-09 | Queen's Club | R16 | grass | Stan Wawrinka | 6-2 6-2 |
| 2013-01-14 | Australian Open | R32 | hard | Stan Wawrinka | 7-6(6) 7-5 6-4 |
| 2010-08-30 | US Open | R16 | hard | Stan Wawrinka | 7-6(9) 6-7(5) 7-5 4-6 6-4 |
| 2009-03-12 | Indian Wells Masters | R32 | hard | Stan Wawrinka | 2-6 7-5 7-6(8) |
Averages from each player's recent completed matches (20 vs 19). ATP, WTA & Challenger.