Market comparison
Boulter vs Ruzic
2 venues · 18 outcome rows · 1 comparable lines · event identity linked · 0 verified parity · active
Polymarket
Open venue ↗17 outcomes · $15K reported volume
Observed 1m ago
Recorded venue end date: Oct 30, 2026
Kalshi
Open venue ↗2 outcomes · $5K reported volume
Observed 7s ago
Recorded venue end date: Nov 6, 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 |
|---|---|---|---|
Boulter Partial parityPayoffs match in ordinary outcomes; see the rule differences above. | 0.5 pp | ||
Antonia Ruzic Not alignedNo persisted outcome identity connects these venue contracts. | — | — | |
Completed Match Not alignedNo persisted outcome identity connects these venue contracts. | — | — | |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 68.0% Bid 66.0% · Ask 70.0% Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 1 O/U 8.5 Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 59.5% Bid 58.0% · Ask 61.0% Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 1 Winner Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 58.5% Bid 57.0% · Ask 60.0% Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 2 Winner Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 50.0% Bid — · Ask 100.0% Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 2 O/U 8.5 Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 50.0% Bid — · Ask 100.0% Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 2 O/U 9.5 Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 50.0% Bid — · Ask 100.0% Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 2 O/U 10.5 Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 50.0% Bid 49.0% · Ask 51.0% Japan Women's Open: Katie Boulter vs Antonia Ruzic Match O/U 21.5 Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 49.0% Bid 48.0% · Ask 50.0% Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 45.0% Bid 40.0% · Ask 50.0% Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 1 O/U 9.5 Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 43.5% Bid 43.0% · Ask 44.0% Japan Women's Open: Katie Boulter vs Antonia Ruzic Match O/U 22.5 Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 42.0% Bid 36.0% · Ask 48.0% Japan Women's Open: Katie Boulter vs Antonia Ruzic Match O/U 23.5 Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 41.0% Bid 40.0% · Ask 42.0% Set Handicap: Katie Boulter (-1.5) vs Antonia Ruzic (+1.5) Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 39.5% Bid 39.0% · Ask 40.0% Japan Women's Open: Katie Boulter vs Antonia Ruzic Total Sets: O/U 2.5 Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 22.0% Bid 20.0% · Ask 24.0% Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 1 O/U 10.5 Open Polymarket ↗ | — | — |
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5 Not alignedNo persisted outcome identity connects these venue contracts. | 21.0% Bid 20.0% · Ask 22.0% Set Handicap: Antonia Ruzic (-1.5) vs Katie Boulter (+1.5) Open Polymarket ↗ | — | — |
Boulter
Partial parityPayoffs match in ordinary outcomes; see the rule differences above.
Polymarket
Kalshi
Price difference 0.5 pp
Antonia Ruzic
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
—
Kalshi
Completed Match
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
68.0%
Bid 66.0% · Ask 70.0%
Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 1 O/U 8.5
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
59.5%
Bid 58.0% · Ask 61.0%
Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 1 Winner
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
58.5%
Bid 57.0% · Ask 60.0%
Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 2 Winner
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
50.0%
Bid — · Ask 100.0%
Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 2 O/U 8.5
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
50.0%
Bid — · Ask 100.0%
Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 2 O/U 9.5
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
50.0%
Bid — · Ask 100.0%
Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 2 O/U 10.5
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
50.0%
Bid 49.0% · Ask 51.0%
Japan Women's Open: Katie Boulter vs Antonia Ruzic Match O/U 21.5
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
49.0%
Bid 48.0% · Ask 50.0%
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
45.0%
Bid 40.0% · Ask 50.0%
Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 1 O/U 9.5
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
43.5%
Bid 43.0% · Ask 44.0%
Japan Women's Open: Katie Boulter vs Antonia Ruzic Match O/U 22.5
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
42.0%
Bid 36.0% · Ask 48.0%
Japan Women's Open: Katie Boulter vs Antonia Ruzic Match O/U 23.5
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
41.0%
Bid 40.0% · Ask 42.0%
Set Handicap: Katie Boulter (-1.5) vs Antonia Ruzic (+1.5)
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
39.5%
Bid 39.0% · Ask 40.0%
Japan Women's Open: Katie Boulter vs Antonia Ruzic Total Sets: O/U 2.5
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
22.0%
Bid 20.0% · Ask 24.0%
Japan Women's Open: Katie Boulter vs Antonia Ruzic Set 1 O/U 10.5
Open Polymarket ↗Kalshi
—
Japan Women's Open: Katie Boulter vs Antonia Ruzic Game Spread +/-3.5
Not alignedNo persisted outcome identity connects these venue contracts.
Polymarket
21.0%
Bid 20.0% · Ask 22.0%
Set Handicap: Antonia Ruzic (-1.5) vs Katie Boulter (+1.5)
Open Polymarket ↗Kalshi
—
Prices are shown as percentages of a $1 payout. “pp” means percentage points. A dash means data is unavailable.