WTA Brisbane: Sharapova misses duel with Barty; Osaka, Bertens and Kvitova continue

Maria Sharapova missed a second-round duel with world number one Ashleigh Barty after a narrow defeat at the WTA Premier tournament in Brisbane. Naomi Osaka , Kiki Bertens and Petra Kvitova , however, were able to prevail in their first round games.