TennisEdge's AI model finds no betting value in E. Mertens vs L. Siegemund (Wimbledon on 2026-06-29) — the market is efficient, with E. Mertens favoured at 1.36.
Independent estimates of who wins, each from a different method. The blend is what the bot prices against the market.
| Method | E. Mertens | L. Siegemund |
|---|---|---|
| Elo ratings-based, surface-weighted |
65.6% | 34.4% |
| Machine learning 29-feature gradient-boosted model |
69.0% | 31.0% |
| Serve / return point-by-point simulation |
38.0% | 62.0% |
| Blend what the bot actually prices off |
61.0% | 39.0% |
| Market implied de-vigged from the opening odds |
70.2% | 29.8% |
We publish how well these score against the closing market, including where they lose: how accurate are tennis predictions?
| Player | Surface | Elo | Record | Matches |
|---|---|---|---|---|
| E. Mertens | hard | 1855 | 118–77 | 195 |
| L. Siegemund | hard | 1715 | 70–62 | 132 |
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 March 21, 2026.
E. Mertens leads 1–0 over 1 meeting. Full record.
| Date | Event | Surface | Winner | Score |
|---|---|---|---|---|
| June 30, 2026 | Wimbledon | grass | E. Mertens | 2 - 0 |
| 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 |
| L | E. Mertens | 2 - 0 | June 30, 2026 |
| L | S. Bejlek | 2 - 1 | June 23, 2026 |
| L | A. Anisimova | 0 - 2 | June 10, 2026 |
| W | F. Jones | 2 - 0 | June 9, 2026 |
| L | N. Osaka | 0 - 2 | May 26, 2026 |
All June 29, 2026 results & picks →
Wimbledon R128 (grass) - E. Mertens (A) vs L. Siegemund (B) MODELS: ELO A 65.6% | ML A 69.0% | blended model A 61.0% | market implied A 70.2% (1.36) / B 29.8% (3.20). Both ELO and ML sit BELOW market on Mertens, devig surfaces +9.2% on Siegemund (B) -> bot wants 2.5u on B. FORM (grass, last 3wks): - Mertens 3W-3L. Quality signal: beat Eala (1875) 6-3 6-3 DOM, beat Samsonova (1791) GRIND 3 sets, beat Andreescu (1625) 6-1 6-2 DOM. Losses to Osaka (1644), Bartunkova (1759), Ruse (1702). Has a genuine DOM win over a near-elite opponent on grass. - Siegemund 1W-2L. Only grass win vs Jones (1442, weak) 6-2 6-3. LOST to Bejlek (1366, WEAK) in a 3-set grind 3-6 7-6 7-6, and crushed by Anisimova (1883) 1-6 3-6. Losing to a sub-1400 on grass is a red flag. FATIGUE: Both last played 2026-06-23 -> 7 days rest, fully recovered. Mertens carries heavier 14d load (4 matches/12 sets/241min) vs Siegemund (1 match/3 sets/113min), but the week off neutralizes it. No actionable fatigue edge. NARRATIVE: No recent Final for either (no let-down spot). No Wimbledon venue history in window. No title recency. VERDICT: The +9.2% B edge is a devigging artifact at LOW confidence (0.15). The model itself still forecasts Mertens to WIN (61%). Crucially the qualitative read does NOT validate backing the underdog: Siegemund just lost to a 1366 player on grass and was blown out by Anisimova, while Mertens owns a clean DOM win over Eala (1875) on the same surface. Form points toward the favorite, killing the statistical B value. No value on A either (model 61% < implied 70%). PASS - no validated edge.