Monica Niculescu defeated Sorana Cirstea 6-1 7-6 in the Iasi 10K qualifying round on clay. The upset overturned the form book — Sorana Cirstea came in leading the head-to-head 5–4. Monica Niculescu narrowed the head-to-head to 5–5.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-08-06 | Montreal | R64 | hard | Sorana Cirstea | 3-6 6-4 6-4 |
| 2018-03-05 | Indian Wells | R128 | hard | Sorana Cirstea | 6-2 6-3 |
| 2017-05-22 | Nurnberg | R32 | clay | Sorana Cirstea | 6-4 1-0 |
| 2017-03-06 | Indian Wells | R128 | hard | Monica Niculescu | 4-6 6-3 6-1 |
| 2010-08-15 | Montreal | Q16 | hard | Monica Niculescu | 6-3 6-3 |
| 2009-10-19 | Moscow | R32 | hard | Monica Niculescu | 3-0 |
| 2009-06-15 | 's-Hertogenbosch | R32 | grass | Sorana Cirstea | 5-7 6-3 6-3 |
| 2008-10-12 | Zurich | Q32 | hard | Monica Niculescu | 6-4 6-4 |
| 2006-05-08 | Bucharest 2 10K | SF | clay | Sorana Cirstea | 3-6 6-4 7-5 |
Averages over each player's completed matches in the selected window (196 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Cirstea S.: 2 days rest · 2 matches, 47 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 clay field, opponent-adjusted over 52 weeks). About