TennisUPCOMING

Stale· updated 2m ago

ITF Las Palmas: Shannon Lam vs Eleonora Alvisi

Other · July 21, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

$0.000000000000000

Platform Prices — Shannon Lam

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
PolymarketBest	1.32	75.5%	$0.76	---	Bet Here
KalshiBest	1.32	76.0%	$0.76	+0.5pp	Bet Here

PolymarketBest

$0.76

Odds

1.32

Implied

75.5%

Edge

---

Bet Here

KalshiBest

$0.76

Odds

1.32

Implied

76.0%

Edge

+0.5pp

Bet Here

All Outcomes

Shannon Lam

Best: 76.0% on kalshi

▲+0.5%

Prediction market is 0.5% cheaper than sportsbooks. Consider buying on PM.

75.5%

76.0%

Eleonora Alvisi

Best: 24.5% on polymarket

▲+1.0%

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

24.5%

23.5%

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.

Shannon Lam

cheapest single venue: polymarket at 0.755

Retail tier ($5k/venue)

$10.0K@ 0.781 avg

+1.80% vs cheapest single venue

kalshi$5.0K @ 0.767

polymarket$5.0K @ 0.795

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

Sharp tier ($25k/venue)

$30.0K@ 0.801 avg

+0.79% vs cheapest single venue

polymarket$5.0K @ 0.795

kalshi

Arbitrage Opportunity

+1.01%theoretical onlyPAPER

Stake split for $1,000 bankroll

Shannon Lam (polymarket, $763) — slippage 2.4% — eats into edge

Eleonora Alvisi (kalshi, $237) — slippage 8.1% — eats into edge

Outcome	Platform	Odds	Stake	To win
Shannon Lamthin	polymarket	1.32	$763	$1010
Eleonora Alvisithin	kalshi	4.25	$237	$1010

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 — Shannon Lam

Spread

0.5pp

kalshi at 76.0% vs polymarket at 75.5%

Expected Value

+0.66%

Per $1 staked at polymarket (1.32) if kalshi's price is fair.

Kelly Stake

2.0%

Recommended bankroll fraction (capped at quarter Kelly).

Platform Activity

polymarket

updated just now

Volume: $26
24h Volume: $26
Liquidity: $12.2K
Open Interest: $26

Resolves: in 7d 0h

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

kalshi

updated just now

Volume: $9
24h Volume: $9
Liquidity: $0
Open Interest: $7

Resolves: in 14d 0h

Settlement Timeline

polymarketin 7d 0h · Jul 28, 2026, 11:30 AM
kalshiin 14d 0h · Aug 4, 2026, 11:30 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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