The Prediction Markets

European Open: Tallon Griekspoor vs Jiri Lehecka

Starts in 6 hKickoff
Traded
$72K
Venues
Polymarket, Kalshi
Prices updated
1 min ago
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What the markets expect

European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5 74%

Next is Jiri Lehecka at 72%. The venues differ most on Griekspoor (Polymarket 29.5%, Kalshi 28%), a 1.5-point gap.

Odds by venue

Consensus blends each venue’s last price, weighted by how much has traded there. Best Yes price is the cheapest ask across venues, and the payout is what a winning $100 stake returns before fees. Open a row for each venue’s contract name, bid and ask, and how closely their rules match.

Prices come from our regular polls of each venue, the oldest 2 min ago. Ages are as of when this page was built.

  • Polymarket
  • Kalshi
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
74%
Polymarket 74%polled, 2 min agoBest Yes 97¢ on Polymarket, $100 pays $103 (1.03x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Set 1 O/U 8.5
Last price
74%
As of
Polled 2 min ago
Buy Yes
97¢
Sell Yes
51¢
$100 on Yes pays
$103 (1.03x)
Trade this on Polymarket
Jiri Lehecka
72%
Kalshi 72%polled, 1 min agoBest Yes 72¢ on Kalshi, $100 pays $139 (1.39x)
Kalshi
Contract
Jiri Lehecka
Last price
72%
As of
Polled 1 min ago
Buy Yes
72¢
Sell Yes
71¢
$100 on Yes pays
$139 (1.39x)
Volume
$59K
Trade this on Kalshi
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
67.5%
Polymarket 67.5%polled, 2 min agoBest Yes 73¢ on Polymarket, $100 pays $137 (1.37x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Set 1 O/U 9.5
Last price
67.5%
As of
Polled 2 min ago
Buy Yes
73¢
Sell Yes
62¢
$100 on Yes pays
$137 (1.37x)
Trade this on Polymarket
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
62%
Polymarket 62%polled, 2 min agoBest Yes 72¢ on Polymarket, $100 pays $139 (1.39x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Match O/U 21.5
Last price
62%
As of
Polled 2 min ago
Buy Yes
72¢
Sell Yes
52¢
$100 on Yes pays
$139 (1.39x)
Trade this on Polymarket
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
59%
Polymarket 59%polled, 2 min agoBest Yes 61¢ on Polymarket, $100 pays $164 (1.64x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Match O/U 22.5
Last price
59%
As of
Polled 2 min ago
Buy Yes
61¢
Sell Yes
57¢
$100 on Yes pays
$164 (1.64x)
Trade this on Polymarket
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
50%
Polymarket 50%polled, 2 min agoBest Yes 96¢ on Polymarket, $100 pays $104 (1.04x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Set 2 Winner
Last price
50%
As of
Polled 2 min ago
Buy Yes
96¢
Sell Yes
4¢
$100 on Yes pays
$104 (1.04x)
Trade this on Polymarket
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
49.5%
Polymarket 49.5%polled, 2 min agoBest Yes 51¢ on Polymarket, $100 pays $196 (1.96x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Match O/U 23.5
Last price
49.5%
As of
Polled 2 min ago
Buy Yes
51¢
Sell Yes
48¢
$100 on Yes pays
$196 (1.96x)
Trade this on Polymarket
Completed Match
49%
Polymarket 49%polled, 2 min agoBest Yes 97¢ on Polymarket, $100 pays $103 (1.03x)
Polymarket
Contract
Completed Match
Last price
49%
As of
Polled 2 min ago
Buy Yes
97¢
Sell Yes
1¢
$100 on Yes pays
$103 (1.03x)
Trade this on Polymarket
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
48%
Polymarket 48%polled, 2 min agoBest Yes 96¢ on Polymarket, $100 pays $104 (1.04x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Set 2 O/U 10.5
Last price
48%
As of
Polled 2 min ago
Buy Yes
96¢
Sell Yes
1¢
$100 on Yes pays
$104 (1.04x)
Trade this on Polymarket
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
48%
Polymarket 48%polled, 2 min agoBest Yes 96¢ on Polymarket, $100 pays $104 (1.04x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Set 2 O/U 8.5
Last price
48%
As of
Polled 2 min ago
Buy Yes
96¢
Sell Yes
1¢
$100 on Yes pays
$104 (1.04x)
Trade this on Polymarket
Show 7 more outcomes
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
48%
Polymarket 48%polled, 2 min agoBest Yes 96¢ on Polymarket, $100 pays $104 (1.04x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Set 2 O/U 9.5
Last price
48%
As of
Polled 2 min ago
Buy Yes
96¢
Sell Yes
1¢
$100 on Yes pays
$104 (1.04x)
Trade this on Polymarket
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
42%
Polymarket 42%polled, 2 min agoBest Yes 43¢ on Polymarket, $100 pays $233 (2.33x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Total Sets: O/U 2.5
Last price
42%
As of
Polled 2 min ago
Buy Yes
43¢
Sell Yes
41¢
$100 on Yes pays
$233 (2.33x)
Trade this on Polymarket
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
41%
Polymarket 41%polled, 2 min agoBest Yes 42¢ on Polymarket, $100 pays $238 (2.38x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
Last price
41%
As of
Polled 2 min ago
Buy Yes
42¢
Sell Yes
40¢
$100 on Yes pays
$238 (2.38x)
Volume
$65
Trade this on Polymarket
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
37%
Polymarket 37%polled, 2 min agoBest Yes 38¢ on Polymarket, $100 pays $263 (2.63x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Set 1 O/U 10.5
Last price
37%
As of
Polled 2 min ago
Buy Yes
38¢
Sell Yes
36¢
$100 on Yes pays
$263 (2.63x)
Trade this on Polymarket
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
37%
Polymarket 37%polled, 2 min agoBest Yes 38¢ on Polymarket, $100 pays $263 (2.63x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Game Spread +/-3.5
Last price
37%
As of
Polled 2 min ago
Buy Yes
38¢
Sell Yes
36¢
$100 on Yes pays
$263 (2.63x)
Trade this on Polymarket
European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
32.5%
Polymarket 32.5%polled, 2 min agoBest Yes 34¢ on Polymarket, $100 pays $294 (2.94x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka Set 1 Winner
Last price
32.5%
As of
Polled 2 min ago
Buy Yes
34¢
Sell Yes
31¢
$100 on Yes pays
$294 (2.94x)
Volume
$10
Trade this on Polymarket
GriekspoorArb
28.4%
Polymarket 29.5%polled, 2 min agoKalshi 28%polled, 1 min agoBest Yes 28¢ on Kalshi, $100 pays $357 (3.57x)
Polymarket
Contract
European Open: Tallon Griekspoor vs Jiri Lehecka
Last price
29.5%
As of
Polled 2 min ago
Buy Yes
30¢
Sell Yes
29¢
$100 on Yes pays
$333 (3.33x)
Volume
$4K
Trade this on Polymarket
Kalshi
Contract
Tallon Griekspoor
Last price
28%
As of
Polled 1 min ago
Buy Yes
28¢
Sell Yes
27¢
$100 on Yes pays
$357 (3.57x)
Volume
$9K
Trade this on Kalshi
Partial parity

Payoffs match in ordinary outcomes; see the rule differences below the table.

Buying on Kalshi at 28¢ and selling on Polymarket at 29¢ nets 100 bps before fees.

Possible arbitrage before fees: buy Griekspoor on Kalshi at 28¢, sell on Polymarket at 29¢ (100 bps). Check the rules below before trading. See all live spreads

Mostly the same bet: two differences

Where they differ

  • If the match is postponed: Kalshi resolves to a fair price if the match does not start within 48 hours of the scheduled time (tennis: not finished within two weeks); Polymarket stays open until the match is played and resolves 50-50 only if it is cancelled with no make-up (tennis: ~14 days).
  • Kalshi requires a ball to be played and pays the winner; Polymarket pays the player who advances, including on retirement. A pre-match walkover is a fair price on Kalshi, 50-50 on Polymarket.
Polymarket
Polymarket resolves via:
UMA optimistic oracle, source: atptour.com
Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: ATP
Show full rule comparison
  • If the match is postponed: Kalshi resolves to a fair price if the match does not start within 48 hours of the scheduled time (tennis: not finished within two weeks); Polymarket stays open until the match is played and resolves 50-50 only if it is cancelled with no make-up (tennis: ~14 days).
  • Kalshi requires a ball to be played and pays the winner; Polymarket pays the player who advances, including on retirement. A pre-match walkover is a fair price on Kalshi, 50-50 on Polymarket.
  • Trading closes Oct 30, 2026, 2:00 PM UTC on Polymarket and Nov 6, 2026, 11:30 AM UTC on Kalshi.

Summarized from each venue’s published rules; the venue’s own rules page is the final word.

How the odds have moved

The top 3 outcomes on both venues, with the consensus between them. Hover for exact values.

  • European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5
  • Jiri Lehecka
  • European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5

Order books

Each venue’s resting orders for the selected outcome’s Yes contract, side by side. Top of book streams live; depth refreshes every 15 seconds.

Polymarket

Open on Polymarket ↗

Top of book

Connecting
Best bid
—
Spread
—
Best ask
—

Waiting for the first live quote…

Depth · top 8 levels

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Recent trades

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Kalshi

Kalshi doesn’t list European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5 for this event.

What your stake buys

Enter a stake to see where it buys the most after fees, using each venue’s live order book.

$
Buy

Loading both order books…

Buys at the asks resting now (taker orders), cheapest after fees first, from order-book snapshots up to 15 seconds old. Fees: Kalshi 0.07 × price × (1 − price) per share, rounded up to the cent; Polymarket 0.05 × price × (1 − price) per share (sports rate). Fee calculator. Estimates only, not advice.

About this market

Live prediction market odds for "European Open: Tallon Griekspoor vs Jiri Lehecka". European Open: Tallon Griekspoor vs Jiri Lehecka Set Handicap +/-1.5 leads at 74%. Next is Jiri Lehecka at 72%. $72K has traded across 17 outcomes on Kalshi and Polymarket. The market is expected to resolve by Oct 30, 2026.

This market refers to the tennis match between Tallon Griekspoor and Jiri Lehecka in the European Open, originally scheduled for October 23, 2026 at 10:00AM ET. This market will resolve to 'Tallon Griekspoor' if Tallon Griekspoor advances against Jiri Lehecka. This market will resolve to 'Jiri Lehecka' if Jiri Lehecka advances against Tallon Griekspoor. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 6, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the ATP Tour. A consensus of credible reporting may also be used.

Questions

What does the consensus price mean?

It is the price of a Yes contract that pays $1 if the outcome happens. A 14¢ price means traders put the chance near 14%. Where two venues list the same outcome, we blend their last prices, weighting the venue with more trading volume more heavily (neither counts for less than a quarter). When only one outcome can win, each venue’s prices add up to a little over 100% (its margin); the fair chance removes that margin so the outcomes add up to exactly 100%.

How is the payout worked out?

A Yes contract pays $1 if it wins, so at the best ask a $100 stake buys 100 ÷ ask contracts. At 18¢ that is about 555 contracts, paying $556 (5.56x) if Yes happens. Venue fees and price slippage on larger orders are not included.

Why do the venues show different prices?

Each venue has its own traders, fees and order book. Contracts can also settle on slightly different terms, which is why each row lists how closely the rules match.

Is a price gap an arbitrage?

Only when you can buy Yes on one venue below what someone pays for Yes on the other, after fees, and both contracts settle the same way. We show the executable bid and ask so you can check.

How fresh are these prices?

Venue prices refresh every few minutes, and the order book and live quotes stream continuously. Each venue’s card shows when we last observed it.

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