TennisUPCOMING

Stale· updated 3m ago

ITF Amstetten: Julia Grabher vs Ekaterina Perelygina

Other · July 21, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

$0K

Platform Prices — Julia Grabher

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
KalshiBest	1.09	91.5%	$0.92	---	Bet Here
Polymarket	1.08	92.5%	$0.93	+1.0pp	Bet Here

KalshiBest

$0.92

Odds

1.09

Implied

91.5%

Edge

---

Bet Here

Polymarket

$0.93

Odds

1.08

Implied

92.5%

Edge

+1.0pp

Bet Here

All Outcomes

Julia Grabher

Best: 92.5% on polymarket

▲+1.0%

Prediction market is 1.0% cheaper than sportsbooks. Consider buying on PM.

92.5%

91.5%

Ekaterina Perelygina

Best: 9.0% on kalshi

▲+1.5%

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

7.5%

9.0%

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.

Julia Grabher

cheapest single venue: kalshi at 0.915

Retail tier ($5k/venue)

$6.0K@ 0.933 avg

+0.32% vs cheapest single venue

kalshi$5.0K @ 0.930

polymarket$1.0K @ 0.948

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

Sharp tier ($25k/venue)

$26.0K@ 0.931 avg

+0.07% vs cheapest single venue

kalshi$25.0K @ 0.930

polymarket

Arbitrage Opportunity

+1.01%theoretical onlyPAPER

Fillable up to $115

Ekaterina Perelygina (polymarket, $76) — slippage 173.3% > 10% cap — fillable up to $9

Outcome	Platform	Odds	Stake	To win
Julia Grabherthin	kalshi	1.09	$924	$1010
Ekaterina Perelygina	polymarket	13.33	$76	$1011

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 — Julia Grabher

Spread

1.0pp

polymarket at 92.5% vs kalshi at 91.5%

Expected Value

+1.09%

Per $1 staked at kalshi (1.09) if polymarket's price is fair.

Kelly Stake

11.8%

Recommended bankroll fraction (capped at quarter Kelly).

Platform Activity

polymarket

updated just now

Volume: $1.2K
24h Volume: $1.2K
Liquidity: $13.7K
Open Interest: $1.1K

Resolves: in 7d 1h

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

kalshi

updated just now

Volume: $839
24h Volume: $839
Liquidity: $0
Open Interest: $839

Resolves: in 14d 3h

Settlement Timeline

polymarketin 7d 1h · Jul 28, 2026, 8:00 AM
kalshiin 14d 3h · Aug 4, 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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