TennisUPCOMING

Live· updated 57s ago

HSBC Championships: Katie Boulter vs Donna Vekic

Other · June 13, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

$0K

Platform Prices — Katie Boulter

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
KalshiBest	1.89	53.0%	$0.53	---	Bet Here
Polymarket	1.87	53.5%	$0.54	+0.5pp	Bet Here

KalshiBest

$0.53

Odds

1.89

Implied

53.0%

Edge

---

Bet Here

Polymarket

$0.54

Odds

1.87

Implied

53.5%

Edge

+0.5pp

Bet Here

All Outcomes

Katie Boulter

Best: 53.5% on polymarket

▲+0.5%

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

53.5%

53.0%

Donna Vekic

Best: 48.0% on kalshi

▲+1.5%

Prediction market is 1.5% cheaper than sportsbooks. Consider buying on PM.

46.5%

48.0%

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.

Katie Boulter

cheapest single venue: kalshi at 0.530

Retail tier ($5k/venue)

$10.0K@ 0.536 avg

+0.68% vs cheapest single venue

kalshi$5.0K @ 0.533

polymarket$5.0K @ 0.540

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

Sharp tier ($25k/venue)

$50.0K@ 0.552 avg

+1.79% vs cheapest single venue

kalshi$25.0K @ 0.542

polymarket

Arbitrage Opportunity

+0.50%fillable risk-free returnEXECUTABLE

Stake split for $1,000 bankroll

Outcome	Platform	Odds	Stake	To win
Katie Boulterthin	kalshi	1.89	$533	$1005
Donna Vekic	polymarket	2.15	$467	$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 — Katie Boulter

Spread

0.5pp

polymarket at 53.5% vs kalshi at 53.0%

Expected Value

+0.94%

Per $1 staked at kalshi (1.89) if polymarket's price is fair.

Kelly Stake

1.1%

Recommended bankroll fraction (capped at quarter Kelly).

Platform Activity

polymarket

updated just now

Volume: $1.6K
24h Volume: $1.6K
Liquidity: $74.5K
Open Interest: $1.6K

Resolves: in 7d 9h

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

kalshi

updated just now

Volume: $31.9K
24h Volume: $31.8K
Liquidity: $0
Open Interest: $31.7K

Resolves: in 14d 5h

Settlement Timeline

polymarketin 7d 9h · Jun 20, 2026, 1:00 PM
kalshiin 14d 5h · Jun 27, 2026, 9:00 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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