US Open ATP: Jakub Mensik vs Learner Tien odds: Kalshi vs Polymarket
Sat, Sep 5, 2026, 10:15 PM ET · started · ATP tennis matches · $13.3M traded in 24h across both venues.
Learner Tien: Kalshi 69¢ vs Polymarket 68¢, +1.0 pp
Mid prices. A price is the market's probability: 69¢ means 69%. 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.
-3.09¢ per $1, after fees
Buy Jakub Mensik @ Kalshi 32¢, Learner Tien @ Polymarket 68¢
All outcomes
| Outcome | Kalshi bid / ask | Polymarket bid / ask | Gap |
|---|---|---|---|
| Jakub Mensik | 31¢ / 32¢ | 32¢ / 33¢ | -1.0 pp |
| Learner Tien | 68¢ / 69¢ | 67¢ / 68¢ | +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.