World No 1 Aryna Sabalenka defended her Brisbane International crown by beating Marta Kostyuk 6-4, 6-3. The Belarusian claimed her 22nd career WTA title and fifth in Australia, becoming one of only three women to defend the season-opening WTA 500 event
Matches postponed on Thursday included Jessica Pegula vs. Karolina Muchova in the second round, Zheng Qinwen vs. Magdalena Frech, and Anastasia Pavlyuchenkova vs. Caroline Wozniacki.
