Aryna Sabalenka vs Marta Kostyuk Prediction & Picks - WTA Brisbane

Prediction published on 1/10/26, 9:53 PM  by Lou Aguila in Tennis Picks

Marta Kostyuk of Ukraine will try to complete her fairy tale run at the 2026 Brisbane International as she guns for the title against Aryna Sabalenka of Belarus on Sunday.

Kostyuk, who has racked up three consecutive top-10 wins, is a +255 underdog against the reigning world’s No.1 and defending champion Aryna Sabalenka.

Best Pick: Marta Kostyuk +4.5 Games

Potential Payout: $222 on a $122 Bet

Current Form:

Kostyuk has put on a show in Brisbane to start her 2026 WTA Tour campaign. The Ukrainian beauty marched into the finals of the Brisbane International after posting a dominant win over world No.6 Jessica Pegula of the United States 6-0, 6-3 on Saturday. Kostyuk collected her third win over a top-10 opponent this week alone after besting the world’s No.3 Amanda Anisimova 6-4, 6-3 and world’s No.9 Mirra Andreeva 7-6, 6-3.

Sabalenka made it through to another final following her surgical win over Karolina Muchova 6-3, 6-4. After posting a straight-set win over Sorana Cirstea and Madison Keys, the Belarusian powerhouse sustained her impeccable form in her semifinal win over Muchova, seizing 36 points behind the first serves and breaking twice.