Tennis odds on Kalshi vs Polymarket
ATP, WTA and ITF match markets. Right now there are 58 open Tennis markets — 25 on Kalshi, 33 on Polymarket — carrying $464k of volume in the last 24 hours.
Open Tennis markets, by volume
| Market | Venue | Yes | 24h volume | Closes |
|---|---|---|---|---|
| Valencia: Guiomar Maristany vs Marina Bassols Ribera | polymarket | 63¢ | $317k | 09-17 13:30 UTC |
| Phan Thiet 4: Blake Ellis vs Ilia Simakin | polymarket | 23¢ | $22k | 09-17 04:50 UTC |
| Caldas da Rainha: Francisca Jorge vs Victoria Jimenez Kasintseva | polymarket | 45¢ | $22k | 09-17 13:30 UTC |
| Frech vs Jovic — Iva Jovic | kalshi | 75¢ | $9k | 09-17 23:10 UTC |
| Guangzhou: Petr Bar Biryukov vs Naoya Honda | polymarket | 66¢ | $9k | 09-17 07:30 UTC |
| M15 Hurghada, Main Draw: Completed Match: Ivan Gretskiy vs Keshav Chopra | polymarket | 51¢ | $7k | 09-17 06:00 UTC |
| Guangzhou: James Kent Trotter vs Mitsuki Wei Kang Leong | polymarket | 66¢ | $7k | 09-17 07:30 UTC |
| M15 Hurghada, Main Draw: Completed Match: Sergey Betov vs Viktor Frydrych | polymarket | 51¢ | $6k | 09-17 06:00 UTC |
| Bucsa vs Bejlek — Sara Bejlek | kalshi | 65¢ | $6k | 09-17 21:00 UTC |
| W35 Hurghada, Main Draw: Completed Match: Emily Appleton vs Yuliya Hatouka | polymarket | 51¢ | $5k | 09-17 06:00 UTC |
| Bucsa vs Bejlek — Cristina Bucsa | kalshi | 36¢ | $4k | 09-17 21:00 UTC |
| W50 Pazardzhik, Main Draw: Completed Match: Elizara Yaneva vs Julia Adams | polymarket | 51¢ | $4k | 09-17 07:00 UTC |
| M25 Zlatibor, Main Draw: Completed Match: Marko Knezevic vs Drazen Petrovic | polymarket | 98¢ | $4k | 09-17 07:00 UTC |
| Szczecin: Daniel Galan vs Nikolas Sanchez Izquierdo | polymarket | 56¢ | $3k | 09-17 15:00 UTC |
| M25 Zlatibor: Kristijan Juhas vs Tadija Radovanovic | polymarket | 97¢ | $2k | 09-17 07:00 UTC |
| Stearns vs Stephens — Sloane Stephens | kalshi | 39¢ | $2k | 09-17 21:00 UTC |
| Guadalajara Open Akron: Peyton Stearns vs Sloane Stephens | polymarket | 62¢ | $2k | 09-18 00:30 UTC |
| Lys vs Podoroska — Eva Lys | kalshi | 67¢ | $2k | 09-17 23:30 UTC |
| Avanesyan vs Charaeva — Alina Charaeva | kalshi | 44¢ | $2k | 09-17 19:20 UTC |
| Avanesyan vs Charaeva — Elina Avanesyan | kalshi | 56¢ | $2k | 09-17 19:20 UTC |
The 20 most active of 58, by 24h volume across both venues, refreshed every few minutes. A market listed on only one venue has no cross-venue price to compare against — which is true of most of them.
What two venues' prices are worth
A gap between Kalshi and Polymarket on the same Tennis market is usually fees, depth, or two contracts that settle differently — not free money. The arbitrage guide shows today's gaps before and after fees, and the fee page shows why the cost peaks near 50¢.
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