A. De Minaur vs B. Nakashima — Prediction & Analysis

TennisEdge's AI model finds no betting value in A. De Minaur vs B. Nakashima (Washington on 2026-07-31) — the market is efficient, with A. De Minaur favoured at 1.58.

Model probabilities

Independent estimates of who wins, each from a different method. The blend is what the bot prices against the market.

We publish how well these score against the closing market, including where they lose: how accurate are tennis predictions?

Elo ratings

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 July 31, 2026.

Head to head

B. Nakashima leads 3–1 over 4 meetings. Full record.

Recent form

All July 31, 2026 results & picks →

Full analysis

De Minaur (A, #6, 27) vs Nakashima (B, #33, 24) — Washington QF, hard.

MODELS vs MARKET
  Betfair ML: A 1.60 (raw 62.5%, commission-adj implied 63.7%) / B 2.64.
  ELO 70.6% | ML 75.0% | sim(model) 64.9% for A. Market sits mid-pack at ~63.7%.
  Resimulate baseline: A 55.0% (OUTLIER low) — SPW A 0.611/hold 75.6% looks
  suppressed for a top-6 hard-courter; his 50-match window is dominated by weak
  grass (Hertogenbosch final loss, Wimbledon R16 loss to Cobolli) and dismal clay
  (French 0-6 sets vs Mensik, Hamburg SF loss). Justified surface shade spw_a
  0.611->0.64 (+0.03, within clamp) -> A 69.7%. But that 0.03 input moved the sim
  +15pp — hyper-sensitive, so it gives NO reliable anchor. Honest range 55–70%;
  defensible centre ~63-65%, i.e. basically AT market.

RECENT FORM (last 5)
  De Minaur: W Hewitt 6-2 6-3 (Weak, DOM, 07-30); W Tsitsipas 6-4 3-6 6-3 (Strong,
  GRIND, 07-29); L Cobolli grass; W Svajda grass; W Mannarino grass. Match-sharp at
  venue (2 matches), on his best surface. Shape STABLE/SHARPENING (beat Strong
  Tsitsipas). Pre-Washington grass/clay stretch was poor.
  Nakashima: W Mensik 7-6 3-6 6-4 (Elite 1917, GRIND, 07-30); W Etcheverry 6-3 6-4
  (Strong, DOM, 07-28); UTS exhibition W/L (elo-1500 placeholders, ignore); L Struff
  grass; W Pinnington Jones grass. Shape POSITIVE (beat Elite Mensik) but physical.

H2H / PATH
  Nakashima beat De Minaur 7-5 6-3 six weeks ago (London QF, grass) — genuine recent
  H2H win, surface-specific but the market already prices it.

FATIGUE (Step 2)
  Both played 07-30. De Minaur won a 2-set match (~neutral, round-progression only).
  Nakashima WON a 3-set match yesterday vs Elite Mensik -> -4.5pp extra-set hangover
  haircut on the dog (age 24, baseline, no modulation). This nudges A up, but G1
  forbids it creating the edge — and the market over-prices visible fatigue, so
  Nakashima's tired story is likely already baked into A's 1.60.

GATES
  G1 edge-origin: FAIL — pre-fatigue honest prob ~63-65% vs commission-adj implied
    63.7%; edge ~0-2%, below the 5% bar. Sim gives no reliable anchor (baseline 55%,
    corrected 70%); ELO/ML high but contradicted by sim + recent H2H; market is mid.
  G2 consensus:   stake-tier only (n/a — no qualifying edge).
  G3 fatal-risk:  n/a (no margin bet staked).

MARKET CHOICE
  ML A @1.60: honest prob ~64% vs implied 63.7% -> ~0% edge. PASS.
  Handicap A -2.5 @2.00 (Betfair): high-variance (laying fav -2.5, needs blowout,
    bar 10%). Expected margin only +0.7 to +2.6 games straddles 2.5; cover ~50-55%
    vs ~51% implied -> no edge. PASS. AH: A -2.5 @ 2.00.
  Totals under 23.0 @1.93: sim expected total 22.5 (baseline) / 21.9 (corrected);
    under ~53-58% vs ~53% implied -> ~2%, marginal, no bet. PASS.

VERDICT: PASS. Efficient favourite price — models split (sim low, ELO/ML high),
market sits right in the middle, sim offers no stable anchor, a recent H2H loss
caps the case, and Nakashima's visible fatigue is likely already priced. No market
clears its edge bar at the executable price.