US Open ATP: Alexander Zverev vs Botic van de Zandschulp odds: Kalshi vs Polymarket
Wed, Sep 9, 2026, 11:30 AM ET · ATP tennis matches · $3k traded in 24h across both venues.
Alexander Zverev: Kalshi 87¢ vs Polymarket 86¢, +0.5 pp
Mid prices. A price is the market's probability: 87¢ means 87%. The gap is Kalshi minus Polymarket in percentage points.
Two separate exchanges, two accounts. Links may carry a referral code, which never changes what is shown. Disclosures.
-1.57¢ per $1, after fees
Buy Alexander Zverev @ Polymarket 87¢, Botic van de Zandschulp @ Kalshi 13¢
All outcomes
| Outcome | Kalshi bid / ask | Polymarket bid / ask | Gap |
|---|---|---|---|
| Alexander Zverev | 86¢ / 87¢ | 85¢ / 87¢ | +0.5 pp |
| Botic van de Zandschulp | 12¢ / 13¢ | 13¢ / 15¢ | -1.5 pp |
Price history, last 3 days
How this is matched
Games are matched across the two exchanges by league, team codes and date. Polymarket prices come from its live order book, Kalshi from its public API. Refreshed every 45 seconds.
What this is not
Read-only. Nothing here places or routes orders and nothing is advice. Fees, slippage and the time it takes to move money between venues are not in these numbers.