US Open ATP: Alex Michelsen vs Tomas Etcheverry odds: Kalshi vs Polymarket
Sun, Sep 6, 2026, 2:30 PM ET · ATP tennis matches · $12k traded in 24h across both venues.
Alex Michelsen: Kalshi 73¢ vs Polymarket 74¢, -1.0 pp
Mid prices. A price is the market's probability: 73¢ means 73%. 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.
-2.99¢ per $1, after fees
Buy Alex Michelsen @ Kalshi 73¢, Tomas Etcheverry @ Polymarket 27¢
All outcomes
| Outcome | Kalshi bid / ask | Polymarket bid / ask | Gap |
|---|---|---|---|
| Alex Michelsen | 72¢ / 73¢ | 73¢ / 74¢ | -1.0 pp |
| Tomas Etcheverry | 27¢ / 28¢ | 26¢ / 27¢ | +1.0 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.