What does a -2.2% edge mean?

A negative edge of -2.2% means the price (+125) is worse than fair value (+130). You can still win, but the long-run math is against you.

Does a positive edge mean the bet is likely to win?

No. The market still implies about a 44.4% chance this hits at the offered odds. A +EV bet pays more than its true probability warrants — most +EV bets at long odds still lose individually.

How are fair odds calculated?

Sportsbook prices on the same market are de-vigged and averaged to estimate a true win probability. Using the available market price, we estimate 43.5%, which converts to fair odds of +130.

Why does this grade differ from the sportsbook's advertised lift?

Books quote lifts vs their own original line, which already includes margin. We compare the price to a vig-free consensus, so an advertised lift can still grade poorly if the underlying line was inflated.

Should I bet every bet that grades well?

Grading is a price-quality signal, not a guarantee. Even a B-grade bet can lose. Size within your bankroll, account for correlation, and don't chase results.

Miriana Tona to win Set 1 — B Grade — Modest Edge Play (51/100)

All analyses

AiOddsLab

Bet365

Better Off PassingBalancedB

Price or risk doesn't justify it

Miriana Tona to win Set 1

We'd rather tell you "we can't grade this" than fake a number. Pass, or stake it like entertainment.

Stake idea · Balanced

0.5u · Half

Reasonable spot — half a unit keeps it fun.

Your odds

+125

Fair odds

+130

Edge

—

Settle the debate

One brand · 3 sizes

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Inside angles

Researching…

Pulling weather, lineups, head-to-head, and schedule spots…

Angles are surfaced only when backed by a specific fact. Verify lineups and weather close to game time.

AI breakdown

Verdict: the matchup on Miriana Tona to win Set 1 at this price has an interesting payout, and the market is still developing.

Value: the matchup isn't a comparable market consensus to measure directly against, but your offered price of +125 provides a solid return if she comes through.
Market context: With no combined market consensus or devigged fair odds available, this looks like an early or thin market.
Status: the matchup's no notable injury signal for Miriana Tona.
Social: the matchup isn't enough social data to get a read on public sentiment for this match.
Risk: This is a single-leg bet, which inherently has less multi-leg parlay variance but still carries the inherent uncertainty of a single match outcome.

Smart insight: This bet's value will hinge entirely on Miriana the matchup performance in the first set, making early match form key. Similar profile: the matchup props in developing tennis markets often show wider price discrepancies compared to more mature markets due to lower betting volume. Counter-case: The biggest challenge here is the lack of comparable market data, meaning the strength of the offered price is harder to validate objectively. Live context: the matchup for any last-minute news or line movement before the match starts as the market matures.

Stake suggestion: the matchup stake.

How this bet was graded

Grade B · 51/100 · Better Off Passing

Miriana Tona to win Set 1 at +125 on Bet365: we couldn't match this slip to enough comparable market prices to compute a trustworthy consensus fair value, so no edge % is shown — anything we'd print would just echo the book's own vig. The grade leans on price lift vs the original (+0.0%), leg count, and variance. Treat it as directional.

Frequently asked questions

Why isn't an edge % shown?

We couldn't match this slip to enough comparable market prices to compute a trustworthy fair value. Rather than show a number derived from the offered price itself (which would just echo the book's vig), we leave the edge unstated. The grade still reflects price lift vs the original, variance, and confidence.

Does the grade still mean something?

Yes. B (51/100) is built from the price lift, leg count, variance, and any verified context signals — it's directional. Treat it as a sanity check, not a precise EV figure.

Should I bet every A-grade ticket?

Grading is a price-quality signal, not a prediction. Even an B-grade ticket can lose. Size within your bankroll, account for correlation between legs, and use Inside Angles above to spot factors the price hasn't absorbed yet.