TennisUPCOMING

Live· updated 1m ago

Wimbledon, Qualification ATP: Stefano Napolitano vs Billy Harris

Tennis · June 22, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

$0.000000

Platform Prices — Stefano Napolitano

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
PolymarketBest	3.92	25.5%	$0.26	---	Bet Here
KalshiBest	3.92	25.5%	$0.26	---	Bet Here

PolymarketBest

$0.26

Odds

3.92

Implied

25.5%

Edge

---

Bet Here

KalshiBest

$0.26

Odds

3.92

Implied

25.5%

Edge

---

Bet Here

All Outcomes

Stefano Napolitano

Best: 25.5% on kalshi

▼0.0%

Prices are roughly equal across platforms.

25.5%

Billy Harris

Best: 74.5% on polymarket

▲+0.5%

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

74.5%

74.0%

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.

Stefano Napolitano

cheapest single venue: polymarket at 0.255

Retail tier ($5k/venue)

$5.0K@ 0.405 avg

+0.00% vs cheapest single venue

kalshi$5.0K @ 0.405

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

Sharp tier ($25k/venue)

$25.0K@ 0.700 avg

+0.00% vs cheapest single venue

kalshi$25.0K @ 0.700

Algo-trader tier — combines order-book depth and per-book stake limits at $25k each.

Whale tier (max known capacity)

Arbitrage Opportunity

+0.50%theoretical onlyPAPER

Stake split for $1,000 bankroll

Stefano Napolitano (polymarket, $256) — not enough depth at $256 — fillable up to $9

Outcome	Platform	Odds	Stake	To win
Stefano Napolitanothin	polymarket	3.92	$256	$1005
Billy Harristhin	kalshi	1.35	$744	$1005

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 — Stefano Napolitano

Spread

0.0pp

kalshi at 25.5% vs polymarket at 25.5%

Expected Value

0.00%

Per $1 staked at polymarket (3.92) if kalshi's price is fair.

Kelly Stake

0.0%

EV is negative or marginal — Kelly says skip.

Platform Activity

polymarket

updated just now

Volume: $175
24h Volume: $175
Liquidity: $9.7K
Open Interest: $173

Resolves: in 7d 15h

Source: https://www.atptour.com/en/scores/current

kalshi

updated just now

Volume: $30
24h Volume: $30
Liquidity: $0
Open Interest: $30

Resolves: in 14d 15h

Settlement Timeline

polymarketin 7d 15h · Jun 29, 2026, 10:00 AM
kalshiin 14d 15h · Jul 6, 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

Related Events

Tennis

▲+13.6%

Wimbledon, Qualification ATP: Nikolas Sanchez Izquierdo vs Soon-Woo Kwon

Vol: $1K

Tennis

▲+8.7%

Wimbledon, Qualification ATP: Guy Den Ouden vs Yi Zhou

Vol: $564.976075

Tennis

▲+8.0%

Wimbledon, Qualification ATP: Stefano Travaglia vs Luka Mikrut

Vol: $98.13876900000001

Tennis

▲+7.6%

Wimbledon, Qualification ATP: Tristan Boyer vs Genaro Alberto Olivieri

18+ only. Gambling involves risk. Please gamble responsibly. If you or someone you know has a gambling problem, call 1-800-522-4700. OddsBridge does not accept bets -- we provide odds comparison and informational content only. Past performance does not guarantee future results. Odds and prices shown may not reflect the most current values. Always verify prices on the platform before placing a bet or trade.