TennisUPCOMING

Live· updated 48s ago

Internationaux de Strasbourg: Madison Keys vs Cristina Bucsa

Other · May 18, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

$0.000000

Platform Prices — Madison Keys

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
PolymarketBest	1.20	83.5%	$0.84	---	Bet Here
Kalshi	1.16	86.0%	$0.86	+2.5pp	Bet Here

PolymarketBest

$0.84

Odds

1.20

Implied

83.5%

Edge

---

Bet Here

Kalshi

$0.86

Odds

1.16

Implied

86.0%

Edge

+2.5pp

Bet Here

All Outcomes

Madison Keys

Best: 86.0% on kalshi

▲+2.5%

Prediction market is 2.5% cheaper than sportsbooks. Consider buying on PM.

83.5%

86.0%

Cristina Bucsa

Best: 16.5% on polymarket

▼0.0%

Prices are roughly equal across platforms.

16.5%

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.

Madison Keys

cheapest single venue: polymarket at 0.835

Retail tier ($5k/venue)

$10.0K@ 0.899 avg

+0.77% vs cheapest single venue

kalshi$5.0K @ 0.892

polymarket$5.0K @ 0.906

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

Sharp tier ($25k/venue)

$50.0K@ 0.920 avg

+1.60% vs cheapest single venue

polymarket$25.0K @ 0.906

kalshi

Arbitrage Opportunity

+0.00%theoretical onlyPAPER

Stake split for $1,000 bankroll

Cristina Bucsa (kalshi, $165) — slippage 292.0% > 10% cap

Outcome	Platform	Odds	Stake	To win
Madison Keysthin	polymarket	1.20	$835	$1000
Cristina Bucsathin	kalshi	6.06	$165	$1000

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 — Madison Keys

Spread

2.5pp

kalshi at 86.0% vs polymarket at 83.5%

Expected Value

+2.99%

Per $1 staked at polymarket (1.20) if kalshi's price is fair.

Kelly Stake

15.2%

Recommended bankroll fraction (capped at quarter Kelly).

Platform Activity

polymarket

updated just now

Volume: $93
24h Volume: $93
Liquidity: $1.2K
Open Interest: $130

Resolves: in 8d 4h

Source: https://www.wtatennis.com/scores

kalshi

updated just now

Volume: $71
24h Volume: $71
Liquidity: $0
Open Interest: $52

Resolves: in 14d 5h

Settlement Timeline

polymarketin 8d 4h · May 25, 2026, 8:00 AM
kalshiin 14d 5h · May 31, 2026, 8:30 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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