Unless a rule includes a provider-specific exception below, it applies to all three providers (UDX, Kalshi, Crypto/Nadex).
What happens if a player is disqualified, withdraws, or retires?
If a player forfeits, withdraws from consideration, or is disqualified after the match starts, that player's market will resolve to "No". This applies to game winner markets regardless of when in the match the retirement or walkover occurs — even if the walkover happens mid-set.
If the match does not begin, all markets will resolve to the last fair price for each player.
Set Winner (exception): If a retirement occurs during a match, set-level markets that had not yet been fully played out (e.g. a Set 2 Winner pick where retirement happened early in Set 2) cannot be unconditionally settled and will resolve to Fair Market Price. Note: this Fair Market Price exception applies only to Set Winner markets — game winner markets always resolve to "No" for the retiring player when the match has started.
EXCEPTION: Nadex (Predictions powered by UDM Services, LLC)
Contracts on the advancing player/team settle in-the-money
Contracts on the retired/disqualified/withdrawing player/team settle out-of-the-money
The player who advances in the tournament is considered the winner of the match, and the other player is considered the loser of the match
What happens if a match is postponed?
If a match is postponed past its scheduled date, the market remains open and will resolve after whichever comes first: (1) the official result is reported, or (2) two weeks after the originally scheduled date of the final event.
What happens if a match is suspended?
If a match is suspended after starting, the market remains open and will resolve after whichever comes first: (1) the official result is reported, or (2) two years after the originally scheduled date of the final event.
EXCEPTION: Nadex (Predictions powered by UDM Services, LLC)
Contracts stand as long as the match resumes and is completed within two weeks (14 days) of the originally scheduled start time.
If it does not, the market settles as Event Cancelled.
What happens if a match is cancelled?
If a match is delayed but still scheduled within the same tournament, markets remain open. A change of venue or playing surface does not affect this.
If a match is delayed and is no longer scheduled within the same tournament, markets resolve to the last fair price, and a new market will be created for the rescheduled match.
If a match is cancelled before the first set begins, all markets resolve to the last fair price. If cancelled after the first set has started, unsettled markets also resolve to the last fair price.
EXCEPTION: Nadex (Predictions powered by UDM Services, LLC)
The market settles as Event Cancelled.
What happens if my market is an Event Cancelled? (Nadex)
Your pick is paid out based on its recent market price, and your trading fees are refunded. (The payout uses the average price over the week before cancellation.)
Full Rules
For complete rules, reference the market provider's full rulebook:
UDX: UDX Rulebook
Kalshi: Kalshi Rulebook