After a bye in the first round, top seed Aryna Sabalenka edged out Sloane Stephens 7-6 (4), 4-6, 6-4 in the Round of 32 at the National Bank Open on Wednesday. That big serve helped the 23-year-old Belarus, as she blasted 18 aces to Stephens' five. But that weapon sometimes worked against her - Sabalenka also committed 11 double faults to zero for the American. The American might feel a little aggrieved after going down at the end of 145 minutes, as she actually won more points than her opponent. Next up for Sabalenka - Rebecca Marino. And the home crowd. The wildcard from Vancouver has captured the imagination. And two big scalps. #NationalBankOpen #WTA1000