

Mona Barthel defeated Madison Keys 3-6 6-1 7-5 in the Indian Wells round of 64 on hard. The upset overturned the form book — Madison Keys came in ranked #22, leading the head-to-head 2–0, defending last year's round of 64. Mona Barthel claimed a first win over Madison Keys in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-06-24 | Wimbledon | R64 | grass | Madison Keys | 6-4 6-2 |
| 2013-06-10 | Birmingham | R16 | grass | Madison Keys | 6-3 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
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About
Averages over each player's completed matches in the selected window (161 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Barthel M.: 5 days rest · 1 match, 18 games (7d) · Keys M.: 6 days rest · 1 match, 23 games (7d). Higher means fresher. About