TennisEdge's AI model finds no betting value in Z. Sonmez vs H. Vandewinkel (Eastbourne on 2026-06-20) — the market is efficient, with Z. Sonmez favoured at 1.44.
Independent estimates of who wins, each from a different method. The blend is what the bot prices against the market.
| Method | Z. Sonmez | H. Vandewinkel |
|---|---|---|
| Elo ratings-based, surface-weighted |
71.5% | 28.5% |
| Machine learning 29-feature gradient-boosted model |
65.0% | 35.0% |
| Serve / return point-by-point simulation |
65.5% | 34.5% |
| Blend what the bot actually prices off |
66.4% | 33.6% |
| Market implied de-vigged from the opening odds |
64.5% | 35.5% |
We publish how well these score against the closing market, including where they lose: how accurate are tennis predictions?
| Player | Surface | Elo | Record | Matches |
|---|---|---|---|---|
| Z. Sonmez | hard | 1722 | 95–68 | 163 |
| H. Vandewinkel | clay | 1593 | 99–62 | 161 |
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 Aug. 3, 2026.
Level at 1–1 over 2 meetings. Full record.
| Date | Event | Surface | Winner | Score |
|---|---|---|---|---|
| June 20, 2026 | Eastbourne | grass | Z. Sonmez | 2 - 0 |
| Nov. 15, 2025 | WTA Billie Jean King Cup - World Group | — | H. Vandewinkel | 2 - 0 |
| W | R. Marino | 0 - 2 | Aug. 3, 2026 |
| L | E. Kalieva | 1 - 2 | July 29, 2026 |
| W | C. Brace | 2 - 1 | July 28, 2026 |
| L | C. Liu | 0 - 2 | July 1, 2026 |
| W | A. Li | 1 - 2 | June 29, 2026 |
| L | L. Tararudee | 1 - 2 | July 19, 2026 |
| W | A. Zakharova | 0 - 2 | July 18, 2026 |
| W | H. Tan | 1 - 0 | July 17, 2026 |
| W | W. Falkowska | 2 - 1 | July 15, 2026 |
| W | C. Y. Lee | 2 - 0 | July 13, 2026 |
All June 20, 2026 results & picks →
Math-only prediction: no LLM calls used