Aryna Sabalenka overpowers Polina Kudermetova to win Brisbane International

Aryna Sabalenka may not have had it all her own way.

But when it counted, the two-time defending Australian Open champion fired up to beat a brave and battling performance from world number 107, Polina Kudermetova.

The 21-year-old qualifier was eventually overwhelmed 4-6, 6-3, 6-2 in 1 hour and 46…