WTA Tour
K. Day
K. Birrell- Japan Women's Open: Kayla Day vs Kimberly Birrell41¢
- Japan Women's Open: Completed Match: Kayla Day vs Kimberly Birrell52¢
- Day vs. Birrell: Match O/U 21.550¢
- Game Spread: Kimberly Birrell (-3.5) vs Kayla Day (+3.5)44¢
- Set 1 Winner: Kayla Day vs Kimberly Birrell43¢
- Day vs. Birrell: Match O/U 22.543¢
- Set 2 Winner: Kayla Day vs Kimberly Birrell42¢
- Set Handicap: Kimberly Birrell (-1.5) vs Kayla Day (+1.5)41¢
- Day vs. Birrell: Match O/U 23.540¢
- Kayla Day vs. Kimberly Birrell: Total Sets O/U 2.538¢
- Set Handicap: Kayla Day (-1.5) vs Kimberly Birrell (+1.5)25¢
- Day vs. Birrell: Set 1 Games O/U 8.572¢
Kimberly Birrell holds the edge in this WTA 250 Osaka first-round matchup on outdoor hard courts, backed by her No. 41 ranking, recent Korea Open title run that included a straight-sets win over Maya Joint, and stronger recent hard-court results against higher-level opposition. Kayla Day, ranked No. 119 and entering as a lucky loser after a qualifying final loss to Joint, brings solid recent form with seven wins in her last ten matches but owns a 0-4 record against top-50 players over the past year. The pair has no prior head-to-head history, leaving Birrell’s superior ranking, serve-hold consistency, and post-title momentum as the dominant factors reflected in trader consensus. Both players have competed extensively on the Asian swing, with limited rest considerations for either.
Rules
This market refers to the tennis match between Kayla Day and Kimberly Birrell in the Japan Women's Open, originally scheduled for October 20, 2026 at 1:30AM ET. This market will resolve to "Over" if the total number of games completed in the first set equals or exceeds 9. Otherwise, it will resolve to "Under." Any first-set tiebreak counts as one (1) game. If the match is postponed or suspended, this market will remain open until the first set has been completed. A postponement alone will not trigger a 50-50 resolution. If the match is permanently abandoned before the first set is completed, or if the first set has not been completed by November 3, 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 set played according to the match format published by the tournament organizer for that round, including whether the set is decided by a tiebreak. For example, for a line of 9.5, if play stops with the first set at 5-4, completing the set would have required at least 1 additional game, resulting in at least 10 games played, so "Over" would resolve as the winning outcome. The primary resolution source for this market will be official WTA statistics; however, a consensus of credible reporting may also be used. This market may resolve only when the listed period of play has concluded and the result can be definitively determined by the listed resolution source(s).