TennisEdge's AI model finds no betting value in I. Spink vs K. Birrell (Eastbourne on 2026-06-20) — the market is efficient, with K. Birrell favoured at 1.07.
Independent estimates of who wins, each from a different method. The blend is what the bot prices against the market.
| Method | I. Spink | K. Birrell |
|---|---|---|
| Elo ratings-based, surface-weighted |
40.1% | 59.9% |
| Machine learning 29-feature gradient-boosted model |
9.7% | 90.3% |
| Blend what the bot actually prices off |
40.1% | 59.9% |
| Market implied de-vigged from the opening odds |
10.6% | 89.4% |
We publish how well these score against the closing market, including where they lose: how accurate are tennis predictions?
| Player | Surface | Elo | Record | Matches |
|---|---|---|---|---|
| I. Spink | hard | 1371 | 21–24 | 45 |
| K. Birrell | hard | 1773 | 149–98 | 247 |
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. 4, 2026.
K. Birrell leads 1–0 over 1 meeting. Full record.
| Date | Event | Surface | Winner | Score |
|---|---|---|---|---|
| June 20, 2026 | Eastbourne | grass | K. Birrell | 2 - 0 |
| L | N. Sato | 2 - 1 | Aug. 4, 2026 |
| L | N. Bains | 2 - 0 | July 30, 2026 |
| W | S. Rutlauka | 1 - 2 | July 28, 2026 |
| L | E. Appleton | 2 - 0 | July 15, 2026 |
| W | A. Okutoyi | 2 - 1 | July 14, 2026 |
| L | V. Golubic | 0 - 2 | Aug. 2, 2026 |
| L | Y. Ma | 2 - 0 | July 29, 2026 |
| L | S. Cirstea | 2 - 0 | July 2, 2026 |
| W | A. Korneeva | 2 - 1 | June 30, 2026 |
| L | P. Marcinko | 2 - 0 | June 24, 2026 |
All June 20, 2026 results & picks →
Math-only prediction: no LLM calls used