TennisUPCOMING

Stale· updated 2m ago

ITF Knokke-Heist: Maria Martinez Vaquero vs Sarah Van Emst

Other · July 28, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

$0.000000

Platform Prices — Maria Martinez Vaquero

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
KalshiBest	2.38	42.0%	$0.42	---	Bet Here
Polymarket	2.35	42.5%	$0.43	+0.5pp	Bet Here

KalshiBest

$0.42

Odds

2.38

Implied

42.0%

Edge

---

Bet Here

Polymarket

$0.43

Odds

2.35

Implied

42.5%

Edge

+0.5pp

Bet Here

All Outcomes

Maria Martinez Vaquero

Best: 42.5% on polymarket

▲+0.5%

Prediction market is 0.5% cheaper than sportsbooks. Consider buying on PM.

42.5%

42.0%

Sarah Van Emst

Best: 58.0% on kalshi

▲+0.5%

Prediction market is 0.5% cheaper than sportsbooks. Consider buying on PM.

57.5%

58.0%

Aggregate liquidity

across every venue · the only place this number exists

For each outcome, the total fillable capacity if you split across every venue (Polymarket order-book depth + Kalshi order-book depth + Pinnacle / Bet365 / DraftKings stake limits). A whale can't deploy $50k on Polymarket alone without moving the price — but the same $50k splits cleanly across 4 venues at a much tighter aggregate fill price. That's what this panel shows.

Maria Martinez Vaquero

cheapest single venue: kalshi at 0.420

Retail tier ($5k/venue)

$10.0K@ 0.537 avg

+12.31% vs cheapest single venue

kalshi$5.0K @ 0.478

polymarket$5.0K @ 0.596

What you can deploy retail-sized across every venue without moving a single market.

Sharp tier ($25k/venue)

$30.0K@ 0.715 avg

+19.97% vs cheapest single venue

polymarket$5.0K @ 0.596

Arbitrage Opportunity

+0.50%theoretical onlyPAPER

Fillable up to $135

Maria Martinez Vaquero (kalshi, $422) — slippage 2.8% — eats into edge

Sarah Van Emst (polymarket, $578) — slippage 4.2% — eats into edge

Outcome	Platform	Odds	Stake	To win
Maria Martinez Vaquerothin	kalshi	2.38	$422	$1005
Sarah Van Emstthin	polymarket	1.74	$578	$1005

Stake the listed amount on each outcome at the matching platform. Whichever outcome wins, the payout covers the full bankroll plus the margin shown. Verify prices before placing — odds drift quickly.

Cross-Platform Edge — Maria Martinez Vaquero

Spread

0.5pp

polymarket at 42.5% vs kalshi at 42.0%

Expected Value

+1.19%

Per $1 staked at kalshi (2.38) if polymarket's price is fair.

Kelly Stake

0.9%

Recommended bankroll fraction (capped at quarter Kelly).

Platform Activity

polymarket

updated just now

Volume: $85
24h Volume: $85
Liquidity: $2.8K
Open Interest: $15

Resolves: in 7d 9h

Source: https://www.itftennis.com/en/tournament-calendar/

kalshi

updated just now

Volume: $196
24h Volume: $196
Liquidity: $0
Open Interest: $196

Resolves: in 14d 9h

Settlement Timeline

polymarketin 7d 9h · Aug 4, 2026, 10:00 AM
kalshiin 14d 9h · Aug 11, 2026, 10:00 AM

Capital on each platform stays locked until that market settles. When platforms resolve at different times the earlier one frees up bankroll for the next opportunity.

Price History

Illustrative preview · historical tracking coming soon

Trade This Market

Trade on Polymarket Trade on Kalshi

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