TennisEdge's AI bot is backing E. Mertens (moneyline) in N. Osaka vs E. Mertens (Bad Homburg on 2026-06-23).
Independent estimates of who wins, each from a different method. The blend is what the bot prices against the market.
| Method | N. Osaka | E. Mertens |
|---|---|---|
| Elo ratings-based, surface-weighted |
31.1% | 68.9% |
| Machine learning 29-feature gradient-boosted model |
40.4% | 59.7% |
| Serve / return point-by-point simulation |
55.6% | 44.4% |
| Blend what the bot actually prices off |
42.4% | 57.6% |
| Market implied de-vigged from the opening odds |
54.8% | 45.2% |
We publish how well these score against the closing market, including where they lose: how accurate are tennis predictions?
| Player | Surface | Elo | Record | Matches |
|---|---|---|---|---|
| N. Osaka | hard | 1920 | 80–36 | 116 |
| E. Mertens | hard | 1855 | 118–77 | 195 |
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. 1, 2026.
N. Osaka leads 3–2 over 5 meetings. Full record.
| Date | Event | Surface | Winner | Score |
|---|---|---|---|---|
| June 23, 2026 | Bad Homburg | grass | N. Osaka | 2 - 0 |
| Aug. 9, 2024 | Toronto | hard | E. Mertens | 2 - 0 |
| June 11, 2024 | WTA Hertogenbosch | grass | N. Osaka | 2 - 0 |
| March 11, 2024 | WTA Indian Wells | hard | E. Mertens | 2 - 0 |
| Sept. 21, 2019 | Osaka | hard | N. Osaka | 2 - 0 |
| L | A. Eala | 0 - 2 | Aug. 1, 2026 |
| W | E. Cocciaretto | 1 - 2 | July 31, 2026 |
| W | A. Krueger | 0 - 1 | July 29, 2026 |
| L | K. Muchova | 0 - 2 | July 7, 2026 |
| W | A. Sabalenka | 0 - 2 | July 5, 2026 |
| L | L. Noskova | 2 - 0 | July 8, 2026 |
| W | M. Bouzkova | 0 - 2 | July 6, 2026 |
| W | E. Rybakina | 2 - 0 | July 4, 2026 |
| W | M. Timofeeva | 2 - 1 | July 2, 2026 |
| W | L. Siegemund | 2 - 0 | June 30, 2026 |
All June 23, 2026 results & picks →
The model consensus indicates a strong 13.1% edge on E. Mertens, driven by a substantial discrepancy between Osaka's market odds (1.73) and her underlying performance metrics (Elo 1644). While Osaka is the market favorite, the 'Market Chasing' signal suggests her price is artificially short due to reputation rather than current form, whereas Mertens enters with superior recent grass-court volume and a higher quality win in the previous round. Despite Mertens playing more matches recently, the statistical value of backing the true probabilistic favorite at underdog odds is compelling.