US Open ATP: Arthur Gea vs Botic van de Zandschulp odds: Kalshi vs Polymarket
Mon, Sep 7, 2026, 11:00 AM ET · ATP tennis matches · $2k traded in 24h across both venues.
Botic van de Zandschulp: Kalshi 61¢ vs Polymarket 59¢, +2.0 pp
Mid prices. A price is the market's probability: 61¢ means 61%. The gap is Kalshi minus Polymarket in percentage points.
Open on Kalshi ↗Botic van de Zandschulp · 61¢ askOpen on Polymarket ↗Botic van de Zandschulp · 59¢ ask
Two separate exchanges, two accounts. Links may carry a referral code, which never changes what is shown. Disclosures.
-1.21¢ per $1, after fees
Buy Arthur Gea @ Kalshi 39¢, Botic van de Zandschulp @ Polymarket 59¢
All outcomes
| Outcome | Kalshi bid / ask | Polymarket bid / ask | Gap |
|---|---|---|---|
| Arthur Gea | 38¢ / 39¢ | 41¢ / 42¢ | -3.0 pp |
| Botic van de Zandschulp | 60¢ / 61¢ | 58¢ / 59¢ | +2.0 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.