Will Paris Saint-Germain FC win on 2026-09-09?
Crossbook compares what two exchanges, Polymarket and Kalshi, charge for the same event, and publishes a permanent scored record of its own forecasts under published rules.
Tracked on one venue, with Crossbook's own call on the record.
Bid/ask midpoint · retrieved 2026-09-09T03:00:32.046Z. Venue quote-update time is unavailable. Readings can be asynchronous.
94.5%bid 94.0% / ask 95.0%24h volume $15K · liquidity $156Kas of 9 Sept, 03:00 UTCView on PolymarketCrossbook forecast
- 74.0%against a market price of 93.5% at the timeOpen
Logged 7 Sept 2026, 01:51 UTC
- Reference class is strong: PSG at the Parc des Princes against SK Slovan Bratislava, a side from the far weaker Slovak league, in a Champions League Matchweek 1 fixture (f1); talent and resource disparity between the squads is enormous regardless of short-term form.
- PSG's form is a genuine negative signal: 13th in Ligue 1 with 0 wins from 3 (f3), a 1-2 home loss to Monaco (f2), consecutive 2-2 draws against Rennes and Lille (f5), and only 1 win in their last 5 (f4) — this justifies pulling the estimate meaningfully below the naive ~85% top-end for this fixture type.
- Slovan's strong form (unbeaten in five with a 5-0 win, 67% win rate under Yaya Touré) (f6, f7, f8, f9) is mostly narrative rather than signal: those results came in the Slovak 1. Liga, a competition far below Ligue 1/UCL level, and Slovak champions rarely trouble top-five-league giants away from home.
- The market resolves on 90 minutes plus stoppage time, so draws resolve NO — this caps the probability below what a 'advance/win' framing would imply, though home favorites of this caliber still convert at a high rate.
- Unverifiable lineup/injury news for the September 9 match introduces residual uncertainty in both directions and keeps confidence at medium rather than high.
What would change it: Confirmed absences of multiple PSG starters or a heavily rotated lineup for the match, or continued winless league form through the weekend, would push this estimate toward the mid-60s.
Context
Polymarket prices this at 94.5%. No verified equivalent is currently listed on the other venue, so there is no cross venue comparison on this page.
Volume over the last 24 hours is modest, at about $15,097 on the busier venue. It closes in 1 day. Prices this close to resolution move on news rather than on reassessment.
Related markets
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