TennisUPCOMING

Live· updated 1m ago

ITF Kosice: Tyra Caterina Grant vs Erika Andreeva

Other · May 21, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

$0.000000

Platform Prices — Tyra Caterina Grant

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
KalshiBest	1.59	63.0%	$0.63	---	Bet Here
Polymarket	1.50	66.5%	$0.67	+3.5pp	Bet Here

KalshiBest

$0.63

Odds

1.59

Implied

63.0%

Edge

---

Bet Here

Polymarket

$0.67

Odds

1.50

Implied

66.5%

Edge

+3.5pp

Bet Here

All Outcomes

Tyra Caterina Grant

Best: 66.5% on polymarket

▲+3.5%

Prediction market is 3.5% cheaper than sportsbooks. Consider buying on PM.

66.5%

63.0%

Erika Andreeva

Best: 33.5% on kalshi

▼0.0%

Prices are roughly equal across platforms.

33.5%

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.

Tyra Caterina Grant

cheapest single venue: kalshi at 0.630

Retail tier ($5k/venue)

$10.0K@ 0.736 avg

+4.63% vs cheapest single venue

polymarket$5.0K @ 0.703

kalshi$5.0K @ 0.769

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

Sharp tier ($25k/venue)

$50.0K@ 0.786 avg

+11.71% vs cheapest single venue

polymarket$25.0K @ 0.703

Arbitrage Opportunity

+3.63%theoretical onlyPAPER

Stake split for $1,000 bankroll

Tyra Caterina Grant (kalshi, $653) — slippage 6.4% — eats into edge

Erika Andreeva (polymarket, $347) — not enough depth at $347

Outcome	Platform	Odds	Stake	To win
Tyra Caterina Grantthin	kalshi	1.59	$653	$1036
Erika Andreevathin	polymarket	2.98	$347	$1036

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 — Tyra Caterina Grant

Spread

3.5pp

polymarket at 66.5% vs kalshi at 63.0%

Expected Value

+5.56%

Per $1 staked at kalshi (1.59) if polymarket's price is fair.

Kelly Stake

9.5%

Recommended bankroll fraction (capped at quarter Kelly).

Platform Activity

polymarket

updated just now

Volume: $14
24h Volume: $14
Liquidity: $1.0K
Open Interest: $14

Resolves: in 7d 3h

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

kalshi

updated just now

Volume: $170
24h Volume: $170
Liquidity: $0
Open Interest: $170

Resolves: in 14d 3h

Settlement Timeline

polymarketin 7d 3h · May 28, 2026, 10:00 AM
kalshiin 14d 3h · Jun 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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