Aryna Sabalenka wins her second consecutive Brisbane title, defeating Marta Kostyuk amid a tense post-match atmosphere.

Aryna Sabalenka beat Karolina Muchova in straight sets to reach her third Brisbane International final in a row on Saturday, a week before the Australian Open. Sabalenka looked in great touch against the tricky Czech, who had won their last three meetings and went into the match as one of…