TennisUPCOMING

Stale· updated 2m ago

ITF Ollersbach: Jan Kumstat vs Mathys Erhard

Other · July 24, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

Platform Prices — Jan Kumstat

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
KalshiBest	2.04	49.0%	$0.49	---	Bet Here
Polymarket	2.00	50.0%	$0.50	+1.0pp	Bet Here

KalshiBest

$0.49

Odds

2.04

Implied

49.0%

Edge

---

Bet Here

Polymarket

$0.50

Odds

2.00

Implied

50.0%

Edge

+1.0pp

Bet Here

All Outcomes

Jan Kumstat

Best: 50.0% on polymarket

▲+1.0%

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

50.0%

49.0%

Mathys Erhard

Best: 50.0% on polymarket

▲+1.0%

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

50.0%

49.0%

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.

Jan Kumstat

cheapest single venue: kalshi at 0.490

Retail tier ($5k/venue)

$6.0K@ 0.547 avg

+3.28% vs cheapest single venue

polymarket$1.0K @ 0.529

kalshi$5.0K @ 0.550

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

Sharp tier ($25k/venue)

$26.0K@ 0.777 avg

+46.88% vs cheapest single venue

polymarket$1.0K @ 0.529

kalshi

Arbitrage Opportunity

+2.04%theoretical onlyPAPER

Fillable up to $712

Jan Kumstat (kalshi, $500) — slippage 4.4% — eats into edge

Mathys Erhard (kalshi, $500) — slippage 3.2% — eats into edge

Outcome	Platform	Odds	Stake	To win
Jan Kumstatthin	kalshi	2.04	$500	$1021
Mathys Erhardthin	kalshi	2.04	$500	$1021

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 — Jan Kumstat

Spread

1.0pp

polymarket at 50.0% vs kalshi at 49.0%

Expected Value

+2.04%

Per $1 staked at kalshi (2.04) if polymarket's price is fair.

Kelly Stake

2.0%

Recommended bankroll fraction (capped at quarter Kelly).

Platform Activity

polymarket

updated just now

Volume: —
24h Volume: —
Liquidity: $8.0K
Open Interest: —

Resolves: in 7d 10h

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 10h

Settlement Timeline

polymarketin 7d 10h · Jul 31, 2026, 12:00 PM
kalshiin 14d 10h · Aug 7, 2026, 12:00 PM

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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