TennisUPCOMING

Live· updated 1m ago

ITF Doboj: Karol Filar vs Radovan Michalik

Other · May 21, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

$0.0

Platform Prices — Karol Filar

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
PolymarketBest	1.15	87.0%	$0.87	---	Bet Here
Kalshi	1.10	90.5%	$0.91	+3.5pp	Bet Here

PolymarketBest

$0.87

Odds

1.15

Implied

87.0%

Edge

---

Bet Here

Kalshi

$0.91

Odds

1.10

Implied

90.5%

Edge

+3.5pp

Bet Here

All Outcomes

Karol Filar

Best: 90.5% on kalshi

▲+3.5%

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

87.0%

90.5%

Radovan Michalik

Best: 13.0% on polymarket

▲+3.0%

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

13.0%

10.0%

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.

Karol Filar

cheapest single venue: polymarket at 0.870

Retail tier ($5k/venue)

$10.0K@ 0.923 avg

+1.04% vs cheapest single venue

polymarket$5.0K @ 0.913

kalshi$5.0K @ 0.932

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

Sharp tier ($25k/venue)

$50.0K@ 0.941 avg

+3.07% vs cheapest single venue

polymarket$25.0K @ 0.913

kalshi

Arbitrage Opportunity

+3.09%theoretical onlyPAPER

Stake split for $1,000 bankroll

Karol Filar (polymarket, $897) — slippage 2.6% — eats into edge

Radovan Michalik (kalshi, $103) — slippage 251.3% > 10% cap

Outcome	Platform	Odds	Stake	To win
Karol Filarthin	polymarket	1.15	$897	$1031
Radovan Michalikthin	kalshi	10.00	$103	$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 — Karol Filar

Spread

3.5pp

kalshi at 90.5% vs polymarket at 87.0%

Expected Value

+4.02%

Per $1 staked at polymarket (1.15) if kalshi's price is fair.

Kelly Stake

25.0%

Recommended bankroll fraction (capped at quarter Kelly).

Platform Activity

polymarket

updated just now

Volume: $12
24h Volume: $12
Liquidity: $324
Open Interest: $12

Resolves: in 7d 4h

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

kalshi

updated just now

Volume: $73
24h Volume: $73
Liquidity: $0
Open Interest: $73

Resolves: in 14d 2h

Settlement Timeline

polymarketin 7d 4h · May 28, 2026, 10:15 AM
kalshiin 14d 2h · Jun 4, 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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