

Mona Barthel defeated Sloane Stephens 6-4 7-5 in the Luxembourg round of 32 on hard. Mona Barthel narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-17 | Cincinnati | R32 | hard | Sloane Stephens | 3-6 7-6 6-2 |
| 2015-04-06 | Charleston | R32 | clay | Mona Barthel | 6-3 7-6 |
| 2013-08-05 | Toronto | R32 | hard | Sloane Stephens | 6-3 4-6 6-3 |
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
Barthel M.: 14 days rest · 1 match (14d) · Stephens S.: 2 days rest · 4 matches, 81 games (7d). Higher means fresher. About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About