TennisUPCOMING

Stale· updated 2m ago

Hamburg European Open: Arantxa Rus vs Elina Avanesyan

Other · July 21, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

$0K

Platform Prices — Arantxa Rus

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
KalshiBest	3.45	29.0%	$0.29	---	Bet Here
Polymarket	3.28	30.5%	$0.31	+1.5pp	Bet Here

KalshiBest

$0.29

Odds

3.45

Implied

29.0%

Edge

---

Bet Here

Polymarket

$0.31

Odds

3.28

Implied

30.5%

Edge

+1.5pp

Bet Here

All Outcomes

Arantxa Rus

Best: 30.5% on polymarket

▲+1.5%

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

30.5%

29.0%

Elina Avanesyan

Best: 72.0% on kalshi

▲+2.5%

Prediction market is 2.5% cheaper than sportsbooks. Consider buying on PM.

69.5%

72.0%

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.

Arantxa Rus

cheapest single venue: kalshi at 0.290

Retail tier ($5k/venue)

$10.0K@ 0.304 avg

+4.91% vs cheapest single venue

kalshi$5.0K @ 0.290

polymarket$5.0K @ 0.319

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

Sharp tier ($25k/venue)

$50.0K@ 0.406 avg

+40.06% vs cheapest single venue

kalshi$25.0K @ 0.290

polymarket

Arbitrage Opportunity

+1.52%theoretical onlyPAPER

Fillable up to $249

Elina Avanesyan (polymarket, $706) — slippage 2.6% — eats into edge

Outcome	Platform	Odds	Stake	To win
Arantxa Rusthin	kalshi	3.45	$294	$1015
Elina Avanesyanthin	polymarket	1.44	$706	$1015

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 — Arantxa Rus

Spread

1.5pp

polymarket at 30.5% vs kalshi at 29.0%

Expected Value

+5.17%

Per $1 staked at kalshi (3.45) if polymarket's price is fair.

Kelly Stake

2.1%

Recommended bankroll fraction (capped at quarter Kelly).

Platform Activity

polymarket

updated just now

Volume: $228
24h Volume: $228
Liquidity: $52.1K
Open Interest: $703

Resolves: in 7d 1h

Source: https://www.wtatennis.com/scores

kalshi

updated just now

Volume: $3.4K
24h Volume: $3.4K
Liquidity: $0
Open Interest: $3.4K

Resolves: in 14d 1h

Settlement Timeline

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