Sania Mirza and Ivan Dodig. Pic/ AFP

Melbourne: Sania Mirza and Rohana Bopanna advanced to the mixed doubles second round with respective partners at the Australian Open here today. Bopanna and his Canadian partner Gabriela Dabrowski had to dig deep to beat Michael Venus and Katarina Srebotnik 6-4 6-7, 10-7 in a super tie-breaker.