TennisUPCOMING

Live· updated 34s ago

ITF Kayseri: Stefan Cooper vs Jacob Bradshaw

Other · May 21, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

$0.00

Platform Prices — Stefan Cooper

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
KalshiBest	9.09	11.0%	$0.11	---	Bet Here
Polymarket	1.80	55.5%	$0.56	+44.5pp	Bet Here

KalshiBest

$0.11

Odds

9.09

Implied

11.0%

Edge

---

Bet Here

Polymarket

$0.56

Odds

1.80

Implied

55.5%

Edge

+44.5pp

Bet Here

All Outcomes

Stefan Cooper

Best: 55.5% on polymarket

▲+44.5%

Prediction market is 44.5% cheaper than sportsbooks. Consider buying on PM.

55.5%

11.0%

Jacob Bradshaw

Best: 89.5% on kalshi

▲+45.0%

Prediction market is 45.0% cheaper than sportsbooks. Consider buying on PM.

44.5%

89.5%

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.

Stefan Cooper

cheapest single venue: kalshi at 0.110

Retail tier ($5k/venue)

$5.0K@ 0.618 avg

+0.00% vs cheapest single venue

kalshi$5.0K @ 0.618

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

Sharp tier ($25k/venue)

$25.0K@ 0.878 avg

+0.00% vs cheapest single venue

kalshi$25.0K @ 0.878

Algo-trader tier — combines order-book depth and per-book stake limits at $25k each.

Whale tier (max known capacity)

Arbitrage Opportunity

+80.18%theoretical onlyPAPER

Stake split for $1,000 bankroll

Stefan Cooper (kalshi, $198) — slippage 218.2% > 10% cap

Jacob Bradshaw (polymarket, $802) — slippage 2.8% — eats into edge

Outcome	Platform	Odds	Stake	To win
Stefan Cooperthin	kalshi	9.09	$198	$1802
Jacob Bradshawthin	polymarket	2.25	$802	$1802

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 — Stefan Cooper

Spread

44.5pp

polymarket at 55.5% vs kalshi at 11.0%

Expected Value

+404.55%

Per $1 staked at kalshi (9.09) if polymarket's price is fair.

Kelly Stake

25.0%

Recommended bankroll fraction (capped at quarter Kelly).

Platform Activity

polymarket

updated just now

Volume: $10
24h Volume: $10
Liquidity: $298
Open Interest: $10

Resolves: in 7d 2h

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

kalshi

updated just now

Volume: $66
24h Volume: $66
Liquidity: $0
Open Interest: $66

Resolves: in 14d 2h

Settlement Timeline

polymarketin 7d 2h · May 28, 2026, 8:00 AM
kalshiin 14d 2h · Jun 4, 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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