B. Nakashima vs T. Fritz — Prediction & Analysis

TennisEdge's AI model finds no betting value in B. Nakashima vs T. Fritz (Washington on 2026-08-01) — the market is efficient, with T. Fritz favoured at 1.60.

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 Aug. 1, 2026.

Head to head

T. Fritz leads 3–2 over 5 meetings. Full record.

Recent form

All Aug. 1, 2026 results & picks →

Full analysis

B. Nakashima (A, 24, #33) vs T. Fritz (B, 28, #9) - ATP Washington SF, hard.

MODELS
  ELO:    A 36.7% / B 63.3%
  ML:     A 60.3% / B 39.7%  (lone outlier vs everything else)
  Sim:    A 35.3% / B 64.8%  (win_prob, exp margin B -1.6)
  Market: Betfair A 2.70 (~37%) / B 1.55 (~65%); book 2.54 / 1.60
  -> ELO + sim + market + Betfair all agree Fritz ~63-65%. ML is the sole
     disagreer @60% for A; ML break-even/miscalibration is its known failure
     mode. Trusting it against a 3-way consensus is unwarranted.

RECENT FORM (last 5 shown)
  Nakashima: 07-31 W QF vs De Minaur 1991 ELITE (grind, tb) -> big scalp;
    07-30 W vs Mensik 1917 (7-6 3-6 6-4, grind); 07-28 W vs Etcheverry 1780
    (6-3 6-4 DOM); 07-17/18 UTS exhibition (placeholder elo, discount).
    Shape: SHARPENING (beat De Minaur = over-performance). Match-sharp, deep run.
  Fritz: 07-31 W QF vs Michelsen 1901 (6-1 3-6 7-6, grind); 07-29 W vs
    Majchrzak (6-3 6-4 DOM); 07-27 W vs Bergs (6-3 6-4 DOM); Wimbledon QF.
    Shape: STABLE-solid.

FATIGUE (Step 2, calibrated)
  Both played 3-set QFs YESTERDAY (07-31) -> both carry the -4.5pp 3-set-
  hangover haircut; effect roughly cancels between them. Nakashima load far
  heavier (1135min/15 sets vs Fritz 310min/9 sets) but cumulative minutes are
  context, not an edge, and market already sees the deep run. Both age 23-29 =
  baseline, no age modulation. Net: no bettable fatigue edge either side.

NARRATIVE / PATH
  No Final in window (no letdown). Both deep at same event = match-sharp, no
  rust, no surface transition (both hard). ELO~ranking coherent for Fritz.
  Nothing that creates a numeric edge.

MARKET CHOICE (Step 4b) - alt_markets present
  ML: consensus, no edge. A@2.70 vs ELO37% -> edge ~-1%. B@1.55 vs ~63% ->
    edge ~-2%. PASS both.
  Handicap: sim A+2.5 covers 46.5% @1.85 -> edge ~-7%. B-2.5 covers 53.5%
    @2.08 -> edge ~+2.4%, below 5% bar AND laying -2.5 = high-variance tier
    (needs >=10%). PASS.
  Total 24.5: sim under 64.9% @1.98 -> nominal edge ~+13.5%. BUT the edge is
    manufactured entirely by the global bias_correction -3.0 (raw 25.0 -> cal
    22.0); raw projection sits ON the line. Match-specific evidence pushes the
    OTHER way: of these two players' 6 recent Washington matches, 3 went 3
    sets (over 24.5); Nakashima over-prone (2 of 3 last matches over); two
    solid servers + competitive SF => tiebreak/3-set risk = OVER. Under thesis
    rests on one calibration constant, contradicted by scoreline dist + style.
  AH: A +2.5 @ 1.85 (dog ML not staked >=3.0, shadow not required)

GATES (evaluated for strongest candidate = Total UNDER 24.5)
  G1 edge-origin: PASS - under edge is sim 65% vs market 52%, pre-narrative.
  G2 consensus:   stake-tier only - lone sim signal -> capped tier if bet.
  G3 fatal-risk:  FAIL - margin bet, HARD VETO. Under self-negated by an
    in-form-grinder / 3-set-prone matchup (in-event 50% of these two's recent
    matches went over 24.5); margin evidence (scoreline dist, style) argues
    OVER, not under. Units never buy back a negating risk.

VERDICT: PASS. ML is a 3-way consensus on Fritz with no executable edge either
side (ML outlier is the weak model). Handicap edges sub-bar/high-variance. The
only sizeable number - total under - is a calibration artifact vetoed by G3 and
contradicted by the match's own scoreline/style evidence. No priced opinion
beats the exchange here.