TennisUPCOMING

Live· updated 33s ago

ITF Bolszewo: Joelle Lilly Sophie Steur vs Ivana Sebestova

Other · June 18, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

Platform Prices — Joelle Lilly Sophie Steur

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
PolymarketBest	1.18	85.0%	$0.85	---	Bet Here
Kalshi	1.14	87.5%	$0.88	+2.5pp	Bet Here

PolymarketBest

$0.85

Odds

1.18

Implied

85.0%

Edge

---

Bet Here

Kalshi

$0.88

Odds

1.14

Implied

87.5%

Edge

+2.5pp

Bet Here

All Outcomes

Joelle Lilly Sophie Steur

Best: 87.5% on kalshi

▲+2.5%

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

85.0%

87.5%

Ivana Sebestova

Best: 15.0% on polymarket

▲+3.0%

Prediction market is 3.0% cheaper than sportsbooks. Consider buying on PM.

15.0%

12.0%

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.

Joelle Lilly Sophie Steur

cheapest single venue: polymarket at 0.850

Retail tier ($5k/venue)

$6.0K@ 0.888 avg

+1.29% vs cheapest single venue

polymarket$1.0K @ 0.876

kalshi$5.0K @ 0.890

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

Sharp tier ($25k/venue)

$26.0K@ 0.963 avg

+9.89% vs cheapest single venue

polymarket$1.0K @ 0.876

Arbitrage Opportunity

+3.09%theoretical onlyPAPER

Fillable up to $272

Ivana Sebestova (kalshi, $124) — slippage 505.2% > 10% cap — fillable up to $34

Outcome	Platform	Odds	Stake	To win
Joelle Lilly Sophie Steurthin	polymarket	1.18	$876	$1031
Ivana Sebestovathin	kalshi	8.33	$124	$1031

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 — Joelle Lilly Sophie Steur

Spread

2.5pp

kalshi at 87.5% vs polymarket at 85.0%

Expected Value

+2.94%

Per $1 staked at polymarket (1.18) if kalshi's price is fair.

Kelly Stake

16.7%

Recommended bankroll fraction (capped at quarter Kelly).

Platform Activity

polymarket

updated just now

Volume: —
24h Volume: —
Liquidity: $2.8K
Open Interest: —

Resolves: in 7d 0h

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

kalshi

updated just now

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

Resolves: in 14d 0h

Settlement Timeline

polymarketin 7d 0h · Jun 25, 2026, 8:00 AM
kalshiin 14d 0h · Jul 2, 2026, 8:00 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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