Aryna Sabalenka is favored to win against Marta Kostyuk, with most markets pricing Sabalenka around 1.20–1.30 and Kostyuk around 3.50–4.00 based on current outright and form-adjusted odds ranges from leading bookmakers. Sabalenka’s superior ranking, recent Grand Slam titles on hard courts, and her consistent power game on similar surfaces make her the clear pre-match favorite with DexWin - Best Odds on Your Favourite Sports.

The match between Aryna Sabalenka and Marta Kostyuk at the Brisbane (W) tournament is scheduled to start on 11 January 2026 at 6:00 AM UTC. In local Brisbane time, that is 4:00 PM AEST, allowing for a prime afternoon session for spectators in Australia.

The Sabalenka vs Kostyuk match will be played in Brisbane, Australia, at the Brisbane International venue centered on Pat Rafter Arena. The main stadium is an outdoor hard-court arena with a capacity of roughly 5,500–7,000 spectators, known for fast hard courts and hot, humid summer conditions that reward aggressive baseline play.

Prediction: Aryna Sabalenka is projected to win in straight sets, with implied probabilities from current market ranges giving her roughly a 70–80% chance of victory compared to 20–30% for Marta Kostyuk. Odds in the 1.20–1.30 band for Sabalenka and 3.50–4.00 for Kostyuk reflect Sabalenka’s stronger serve, higher break-point conversion on hard courts, and better record at premier warm-up events like Brisbane.

In previous WTA meetings, Aryna Sabalenka leads the head-to-head against Marta Kostyuk, including straight-sets wins on hard courts at major events and key Premier-level tournaments. Kostyuk has been competitive in patches but has not yet translated that into a consistent winning formula against Sabalenka, giving the Belarusian a clear historical edge going into this Brisbane clash.