What does a -2.2% edge mean?

A negative edge of -2.2% means the price (-500) is worse than fair value (-441). 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 83.3% 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 81.5%, which converts to fair odds of -441.

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.

I. Swiatek vs Qinwen Zheng — B Grade — Modest Edge Play (47/100)

All analyses

AiOddsLab

Bet365

Better Off PassingBalancedB

Price or risk doesn't justify it

I. Swiatek vs Qinwen Zheng

Unconfirmed value. Could win, could lose — but it's a feel play, not a data play.

Stake idea · Balanced

0.5u · Half

Reasonable spot — half a unit keeps it fun.

Your odds

-500

Fair odds

-441

Edge

—

Settle the debate

One brand · 3 sizes

Save as image

Send link

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: This single bet on Iga Swiatek is a straightforward play, focusing on a favorite to perform.

Value: the matchup isn't a comparable market consensus to calculate a numerical edge, so you're assessing the offered price of -500 directly against your confidence in Swiatek.
Market context: the matchup this is a single leg with no alternative book listed, the offered price is your market.
Status: the matchup is no notable injury signal for Iga Swiatek.
Social: the matchup isn't enough social data to provide a signal for this matchup.
Risk: This is a single-leg moneyline on a heavy favorite, meaning the risk comes from the low return on a significant stake for the odds.

Smart insight: The outcome of this bet hinges entirely on Iga the matchup performance, as it's a single-leg wager on a strong favorite. Similar profile: the matchup moneyline bets on heavy favorites in tennis typically have a high win probability but require a larger stake for a modest return. Counter-case: The biggest thing working against this bet is the inherent volatility of any single match, where even strong favorites can face unexpected challenges. Live context: the matchup lineups near tip-off.

Stake suggestion: the matchup stake.

How this bet was graded

Grade B · 47/100 · Better Off Passing

I. Swiatek vs Qinwen Zheng at -500 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 (47/100) 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.