TennisEdge's AI model finds no betting value in L. Romero Gormaz vs S. Stephens (French Open on 2026-05-21) — the market is efficient, with S. Stephens favoured at 1.56.
Independent estimates of who wins, each from a different method. The blend is what the bot prices against the market.
| Method | L. Romero Gormaz | S. Stephens |
|---|---|---|
| Elo ratings-based, surface-weighted |
52.6% | 47.4% |
| Machine learning 29-feature gradient-boosted model |
47.5% | 52.5% |
| Serve / return point-by-point simulation |
32.9% | 67.1% |
| Blend what the bot actually prices off |
44.3% | 55.7% |
| Market implied de-vigged from the opening odds |
40.3% | 59.7% |
We publish how well these score against the closing market, including where they lose: how accurate are tennis predictions?
| Player | Surface | Elo | Record | Matches |
|---|---|---|---|---|
| L. Romero Gormaz | clay | 1645 | 174–119 | 293 |
| S. Stephens | hard | 1620 | 53–68 | 121 |
Our own ratings, computed from match results since 2018. Players with fewer than 5 rated matches are omitted rather than shown at a provisional starting value. Last updated July 27, 2026.
S. Stephens leads 1–0 over 1 meeting. Full record.
| Date | Event | Surface | Winner | Score |
|---|---|---|---|---|
| May 21, 2026 | French Open | clay | S. Stephens | 2 - 1 |
| L | S. Sorribes Tormo | 1 - 2 | July 27, 2026 |
| L | O. Oliynykova | 2 - 1 | July 23, 2026 |
| W | V. Erjavec | 2 - 0 | July 21, 2026 |
| L | P. Udvardy | 2 - 1 | July 14, 2026 |
| W | Z. Kulambayeva | 2 - 0 | July 13, 2026 |
| W | S. Sierra | 0 - 2 | Aug. 4, 2026 |
| W | H. Dart | 1 - 2 | Aug. 1, 2026 |
| L | D. Vidmanova | 0 - 2 | July 30, 2026 |
| W | Y. Starodubtseva | 1 - 2 | July 28, 2026 |
| L | R. Zarazua | 2 - 1 | July 23, 2026 |
All May 21, 2026 results & picks →
Math-only prediction: no LLM calls used