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L. Cabrera vs S. Costoulas — Prediction & Analysis

Vancouver · Vancouver - 1/16-finals · July 27, 2026 · 17:00 UTC

TennisEdge's AI model finds no betting value in L. Cabrera vs S. Costoulas (Vancouver on 2026-07-27) — the market is efficient, with S. Costoulas favoured at 1.29.

Surface hard Odds L. Cabrera 3.15 · S. Costoulas 1.29

Verdict: no bet

The model found no value at current prices — the market has this one priced about right. That verdict is part of the public record too.
Profiles: L. Cabrera · S. Costoulas · head-to-head record

Full analysis

L. Cabrera vs S. Costoulas - Vancouver (hard), 1/16-finals

MODELS vs MARKET
  ELO prob A: 42.3% | ML prob A: 38.0% | Blend: 40.6%
  Book: A 3.15 (impl 29.1%) / B 1.29 - book flags value on A (+11.6%)
  Betfair exchange: A 1.58 / B 1.06 (impl 63.3% / 94.3%, sum 157% - stale/illiquid)
  Executable test (A @1.58, comm-adj 1.55): edge = 40.6% - 64.5% = -24%. The exchange
  prices A far BELOW the book - the 3.15 is a stale quote, not value. Kills the A bet.

ELO vs RANKING SANITY
  Cabrera: model-competitive ELO but ranked 305; entire recent slate is W35/W75 fields
  (opponents ELO 1142-1573) - classic farmed rating, ELO edge discounted.
  Costoulas: ranked 146, age 21 - rank and market agree she is the class side here.

RECENT FORM (last 5 each)
  Cabrera (A): L Arseneault (1457) 3-6 4-6 | W Dong (1276) | W Tabunshchyk (1142) |
    W Ivanova (1343) | L Ma (1573) 3-set GRIND. Wins vs Weak only; 0 wins vs Strong+.
  Costoulas (B): L Aksu (1470) 3s | W Aksu Final 7-5 6-2 | W Hibino (1501) GRIND |
    L Valentova | L Hunter (Wimbledon QF). TITLE: Prague 8d ago (clay).

FATIGUE
  A: 6 matches/14d, 4 in 7d, 485 court min, last played 07-25 (2d rest), age 28 baseline.
  B: 4 matches/14d, 430 min, last played 07-20 (7d rest), age 21 fast recovery.
  Court-time diff 55min + rest gap: fatigue edge to Costoulas - confirms market, not A.

NARRATIVE
  Letdown: Costoulas won Prague final 07-19 (8d ago) - outside window, no letdown.
  Surface transition: Costoulas clay -> hard (TRANSITION, mild rust risk on B);
  Cabrera fully hard-court grooved. Not enough to overturn class + exchange price.
  Venue: no prior Vancouver history for either.

GATES
  G1 edge-origin: FAIL - at the executable Betfair price (A 1.58, eff 1.55) the model
    edge is -24%; the book 3.15 is a stale quote the exchange contradicts.
  G2 consensus:   FAIL - market (exchange) and ML both against an A bet; only support is
    an ELO farmed at W35 fields (rank 305 vs 146). No hard independent evidence.
  G3 fatal-risk:  FAIL - Cabrera: 485 min / 4 matches in 7d and lost 2 days ago to a
    1457-ELO opponent; thesis for A self-negates.
  No alt markets priced (handicap/totals null) - no stakeable margin edge either.

VERDICT: PASS. The apparent +11.6% book value on Cabrera evaporates at the executable
exchange price, her ELO is inflated by weak fields, and she is the tired side.
Costoulas to win, but 1.06 on the exchange offers nothing.

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