On day one of the Australian Open 2026, Elsa Jacquemot defeated Marta Kostyuk in a women's singles match.
This match, which took place at ANZ Arena, lasted three hours and 31 minutes. All three sets were decided by a tiebreak, with the final score being 6-7(4) 7-6(4) 7-6[10-7].
This marks the first time since the introduction of final-set tiebreaks in 2019 that a women's singles match at Melbourne Park has had all three sets decided by a tiebreak. Furthermore, the match duration of three hours and 31 minutes establishes it as the longest women's singles match at the event since the 2019 rule change. The previous record was three hours and 20 minutes, set by Emma Navarro and Peyton Stearns last year.