Gilles Simon defeated Dominic Thiem 6-3 4-6 6-2 in the Nice round of 16 on clay. The upset overturned the form book — Dominic Thiem came in leading the head-to-head 9–1. Gilles Simon narrowed the head-to-head to 9–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-03-04 | Indian Wells Masters | R32 | hard | Dominic Thiem | 6-3 6-1 |
| 2018-10-29 | Paris Masters | R32 | hard | Dominic Thiem | 6-4 6-2 |
| 2018-05-21 | Lyon | F | clay | Dominic Thiem | 3-6 7-6(1) 6-1 |
| 2017-07-03 | Wimbledon | R64 | grass | Dominic Thiem | 5-7 6-4 6-2 6-4 |
| 2017-02-27 | Acapulco | R32 | hard | Dominic Thiem | 7-6(7) 6-3 |
| 2017-02-13 | Rotterdam | R16 | hard | Dominic Thiem | 6-4 7-6(4) |
| 2016-09-19 | Metz | SF | hard | Dominic Thiem | 4-6 7-5 6-3 |
| 2015-05-10 | Rome Masters | R32 | clay | Dominic Thiem | 7-6(5) 2-0 RET |
| 2014-08-04 | Canada Masters | R64 | hard | Gilles Simon | 3-6 6-4 6-0 |
| 2014-03-06 | Indian Wells Masters | R64 | hard | Dominic Thiem | 7-6(5) 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 (200 vs 200). ATP, WTA & Challenger.