PolymarketOpen

Serrano vs. Krom: Match O/U 21.5

Under100%
Over0%

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24h volume—
7d volume—
30d volume—
Liquidity$4.1K
Spread1%
ResolvesOct 7, 2026in 7 days

Probability history

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Probability history0%25%50%75%100%Sep 29, 07:51 PMSep 30, 02:15 AMSep 30, 08:40 AMSep 30, 03:05 PMShaded periods have no successful hourly price check.

No recorded data before Sep 29 in this window.

Based on this market’s outcome prices, expressed as probabilities.

Resolution rules

This market refers to the tennis match between Mario Martinez Serrano and Michiel De Krom in the M25 Zaragoza, originally scheduled for September 30, 2026 at 6:30AM ET. This market will resolve to "Over" if the total number of games completed equals or exceeds 22. Otherwise, it will resolve to "Under." All tiebreaks, including any Champions/Super tiebreak, count as one (1) game. If the match is postponed or suspended, this market will remain open until the match has been completed. A postponement alone will not trigger a 50-50 resolution. If the match is permanently abandoned before completion, or if the match has not been completed by October 14, 2026, 11:59 PM ET, this market will resolve 50-50, unless the outcome has already been unconditionally determined based on completed play. An outcome is considered unconditionally determined if it would have been guaranteed under every possible completion of the match played according to the match format published by the tournament organizer for that round, including whether a final set is played as a full set or as a match tiebreak. For example, for a line of 21.5, if play stops at 6-3, 5-6, completing the match would have required at least 2 additional games, resulting in at least 22 games played, so "Over" would resolve as the winning outcome. Likewise, if the published format replaces the final set with a match tiebreak, that tiebreak counts as one (1) game, so for a line of 22.5, if play stops at 6-2, 3-3, the match could have reached at most 22 games and "Under" would resolve as the winning outcome. The primary resolution source for this market will be official ITF statistics; however, a consensus of credible reporting may also be used.

Sourcehttps://www.itftennis.com/en/tournament-calendar/

Other legs of this event

MarketVenuePriceStatus
Serrano vs. Krom: Set 1 Games O/U 8.5Polymarket100% UnderOpen
Mario Martinez Serrano vs. Michiel De Krom: Total Sets O/U 2.5Polymarket100% Under 2.5Open
Set 1 Winner: Mario Martinez Serrano vs Michiel De KromPolymarket100% Michiel De KromOpen
Serrano vs. Krom: Set 2 Games O/U 9.5Polymarket100% UnderOpen
Set 2 Winner: Mario Martinez Serrano vs Michiel De KromPolymarket100% Michiel De KromOpen
Serrano vs. Krom: Set 2 Games O/U 8.5Polymarket100% UnderOpen
Serrano vs. Krom: Match O/U 23.5Polymarket100% UnderOpen
Serrano vs. Krom: Set 2 Games O/U 10.5Polymarket100% UnderOpen
Set Handicap: Michiel De Krom (-1.5) vs Mario Martinez Serrano (+1.5)Polymarket100% Michiel De KromOpen
Set Handicap: Mario Martinez Serrano (-1.5) vs Michiel De Krom (+1.5)Polymarket100% Michiel De KromOpen
Serrano vs. Krom: Match O/U 22.5Polymarket100% UnderOpen
Serrano vs. Krom: Set 1 Games O/U 10.5Polymarket100% UnderOpen
Serrano vs. Krom: Set 1 Games O/U 9.5Polymarket100% UnderOpen
M25 Zaragoza, Main Draw: Completed Match: Mario Martinez Serrano vs Michiel De KromPolymarket100% YesOpen
M25 Zaragoza: Mario Martinez Serrano vs Michiel De KromPolymarket100% Michiel De KromOpen

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As of Sep 30, 04:10 PM UTC