Market comparison
Cerundolo vs Griekspoor
2 venues · 17 outcome rows · 1 comparable lines · event identity linked · 0 verified parity · active
Polymarket
Open venue ↗16 outcomes · $9K reported volume
Observed 1m ago
Recorded venue end date: Oct 31, 2026
Kalshi
Open venue ↗2 outcomes · $2K reported volume
Observed 1m ago
Recorded venue end date: Nov 7, 2026
Known rule differences between venues
- Postponement: Kalshi resolves to a fair price if the game does not start within 48 hours of the scheduled time (tennis: not finished within two weeks); Polymarket stays open until the game is played and resolves 50-50 only if it is cancelled with no make-up (UFC/tennis: ~14 days).
- Ties and draws in two-way sports (NFL, college football, UFC no-contest): both venues pay 50/50.
- Soccer: both settle on 90 minutes plus stoppage time; extra time and penalties excluded.
- Tennis: 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.
- UFC: Kalshi ignores result changes after expiry; Polymarket follows the official UFC result.
- Polymarket two-way moneylines are one contract priced on the first-named side; the other side is its complement (recorded as a derived relation, not a link).
A shared identity alone does not make a price difference executable.
| Outcome | Polymarket | Kalshi | Difference |
|---|---|---|---|
Cerundolo Partial parityPayoffs match in ordinary outcomes; see the rule differences above. | 0.5 pp | ||
Completed Match Not alignedNo persisted outcome identity connects these venue contracts. | — | — | |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 85.0% Bid 78.0% · Ask 92.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Set 1 O/U 8.5 Open Polymarket ↗ | — | — |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 64.0% Bid 63.0% · Ask 65.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 21.5 Open Polymarket ↗ | — | — |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 60.0% Bid 57.0% · Ask 63.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Set 1 O/U 9.5 Open Polymarket ↗ | — | — |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 59.5% Bid 59.0% · Ask 60.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Set 1 Winner Open Polymarket ↗ | — | — |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 57.0% Bid 56.0% · Ask 58.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Game Spread +/-1.5 Open Polymarket ↗ | — | — |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 53.0% Bid 52.0% · Ask 54.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 22.5 Open Polymarket ↗ | — | — |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 50.0% Bid 2.0% · Ask 98.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Set 2 Winner Open Polymarket ↗ | — | — |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 48.5% Bid 1.0% · Ask 96.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Set 2 O/U 8.5 Open Polymarket ↗ | — | — |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 48.0% Bid 1.0% · Ask 95.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Set 2 O/U 9.5 Open Polymarket ↗ | — | — |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 48.0% Bid 1.0% · Ask 95.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Set 2 O/U 10.5 Open Polymarket ↗ | — | — |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 45.5% Bid 45.0% · Ask 46.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Open Polymarket ↗ | — | — |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 41.0% Bid 40.0% · Ask 42.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Set Handicap +/-1.5 Open Polymarket ↗ | — | — |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 37.5% Bid 37.0% · Ask 38.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Total Sets: O/U 2.5 Open Polymarket ↗ | — | — |
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5 Not alignedNo persisted outcome identity connects these venue contracts. | 36.5% Bid 35.0% · Ask 38.0% European Open: Francisco Cerundolo vs Tallon Griekspoor Set 1 O/U 10.5 Open Polymarket ↗ | — | — |
Tallon Griekspoor Not alignedNo persisted outcome identity connects these venue contracts. | — | — |
Cerundolo
Partial parityPayoffs match in ordinary outcomes; see the rule differences above.
Polymarket
Kalshi
Price difference 0.5 pp
Completed Match
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
85.0%
Bid 78.0% · Ask 92.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Set 1 O/U 8.5
Open Polymarket ↗Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
64.0%
Bid 63.0% · Ask 65.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 21.5
Open Polymarket ↗Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
60.0%
Bid 57.0% · Ask 63.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Set 1 O/U 9.5
Open Polymarket ↗Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
59.5%
Bid 59.0% · Ask 60.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Set 1 Winner
Open Polymarket ↗Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
57.0%
Bid 56.0% · Ask 58.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Game Spread +/-1.5
Open Polymarket ↗Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
53.0%
Bid 52.0% · Ask 54.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 22.5
Open Polymarket ↗Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
50.0%
Bid 2.0% · Ask 98.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Set 2 Winner
Open Polymarket ↗Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
48.5%
Bid 1.0% · Ask 96.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Set 2 O/U 8.5
Open Polymarket ↗Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
48.0%
Bid 1.0% · Ask 95.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Set 2 O/U 9.5
Open Polymarket ↗Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
48.0%
Bid 1.0% · Ask 95.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Set 2 O/U 10.5
Open Polymarket ↗Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
45.5%
Bid 45.0% · Ask 46.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Open Polymarket ↗Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
41.0%
Bid 40.0% · Ask 42.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Set Handicap +/-1.5
Open Polymarket ↗Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
37.5%
Bid 37.0% · Ask 38.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Total Sets: O/U 2.5
Open Polymarket ↗Kalshi
—
European Open: Francisco Cerundolo vs Tallon Griekspoor Match O/U 23.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
36.5%
Bid 35.0% · Ask 38.0%
European Open: Francisco Cerundolo vs Tallon Griekspoor Set 1 O/U 10.5
Open Polymarket ↗Kalshi
—
Tallon Griekspoor
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
—
Kalshi
Prices are shown as percentages of a $1 payout. “pp” means percentage points. A dash means data is unavailable.