TennisEdge's AI model finds no betting value in S. Sierra vs K. Juvan (Parma on 2026-05-13) — the market is efficient, with S. Sierra favoured at 1.40.
Independent estimates of who wins, each from a different method. The blend is what the bot prices against the market.
| Method | S. Sierra | K. Juvan |
|---|---|---|
| Elo ratings-based, surface-weighted |
68.1% | 31.9% |
| Machine learning 29-feature gradient-boosted model |
80.6% | 19.4% |
| Serve / return point-by-point simulation |
51.5% | 48.5% |
| Blend what the bot actually prices off |
66.8% | 33.2% |
| Market implied de-vigged from the opening odds |
66.3% | 33.7% |
We publish how well these score against the closing market, including where they lose: how accurate are tennis predictions?
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 May 29, 2026.
S. Sierra leads 1–0 over 1 meeting. Full record.
| Date | Event | Surface | Winner | Score |
|---|---|---|---|---|
| May 13, 2026 | Parma | clay | S. Sierra | 2 - 1 |
| L | S. Stephens | 0 - 2 | Aug. 4, 2026 |
| L | T. Prozorova | 1 - 2 | July 27, 2026 |
| L | C. Gauff | 1 - 2 | July 1, 2026 |
| W | A. Bondar | 2 - 1 | June 29, 2026 |
| L | Q. Zheng | 1 - 2 | June 22, 2026 |
| L | A. Ruzic | 2 - 0 | June 13, 2026 |
| L | G. Maristany | 0 - 2 | May 20, 2026 |
| W | A. Siskova | 2 - 1 | May 19, 2026 |
| L | S. Sierra | 2 - 1 | May 13, 2026 |
| W | M. Uchijima | 2 - 1 | May 11, 2026 |
All May 13, 2026 results & picks →
Math-only prediction: no LLM calls used