TennisUPCOMING

Stale· updated 3m ago

National Bank Open: Panna Udvardy vs Naomi Osaka

Other · August 5, 2026

Best Price

$0.00

Worst Price

$0.00

Max Gap

0.0%

Total Volume

$0.00

Platform Prices — Panna Udvardy

Platform	Decimal Odds	Implied %	Price▲	Edge vs Best	Action
KalshiBest	10.00	10.0%	$0.10	---	Bet Here
Polymarket	8.33	12.0%	$0.12	+2.0pp	Bet Here

KalshiBest

$0.10

Odds

10.00

Implied

10.0%

Edge

---

Bet Here

Polymarket

$0.12

Odds

8.33

Implied

12.0%

Edge

+2.0pp

Bet Here

All Outcomes

Panna Udvardy

Best: 12.0% on polymarket

▲+2.0%

Prediction market is 2.0% cheaper than sportsbooks. Consider buying on PM.

10.0%

12.0%

Naomi Osaka

Best: 88.0% on polymarket

▼0.0%

Prices are roughly equal across platforms.

88.0%

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.

Panna Udvardy

cheapest single venue: kalshi at 0.100

Retail tier ($5k/venue)

$10.0K@ 0.349 avg

+108.40% vs cheapest single venue

kalshi$5.0K @ 0.168

polymarket$5.0K @ 0.531

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

Sharp tier ($25k/venue)

$30.0K@ 0.476 avg

+2.38% vs cheapest single venue

kalshi$25.0K @ 0.465

polymarket

Arbitrage Opportunity

+2.04%theoretical onlyPAPER

Fillable up to $702

Panna Udvardy (kalshi, $102) — slippage 15.3% > 10% cap — fillable up to $72

Outcome	Platform	Odds	Stake	To win
Panna Udvardythin	kalshi	10.00	$102	$1020
Naomi Osakathin	kalshi	1.14	$898	$1020

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 — Panna Udvardy

Spread

2.0pp

polymarket at 12.0% vs kalshi at 10.0%

Expected Value

+20.00%

Per $1 staked at kalshi (10.00) if polymarket's price is fair.

Kelly Stake

2.2%

Recommended bankroll fraction (capped at quarter Kelly).

Platform Activity

kalshi

updated just now

Volume: $809
24h Volume: $809
Liquidity: $0
Open Interest: $809

Resolves: in 14d 22h

polymarket

updated just now

Volume: —
24h Volume: —
Liquidity: $7.6K
Open Interest: —

Resolves: in 8d 21h

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

Settlement Timeline

polymarketin 8d 21h · Aug 13, 2026, 2:00 PM
kalshiin 14d 22h · Aug 19, 2026, 3:00 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 Kalshi Trade on Polymarket

Related Events

Tennis

▲+4.5%

National Bank Open: Sloane Stephens vs Belinda Bencic

Vol: $36.4

Tennis

▲+2.5%

National Bank Open: Liudmila Samsonova vs Barbora Krejcikova

Vol: $145.426083

Tennis

▲+1.5%

National Bank Open: Renata Zarazua vs Leylah Fernandez

Vol: $2K

Tennis

▲+1.5%

National Bank Open: Daria Kasatkina vs Elena Rybakina

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.