Sania and Bopanna get to the final four of the mixed doubles at the Australian Open

A walkover in the quarterfinals earned Sania Mirza and Rohan Bopanna a spot in the semis of the mixed doubles competition at the Australian Open on Tuesday.

The Indian duo, who have yet to drop a set in this event, were scheduled to face Jelena Ostapenko and David Vega Hernandez of Latvia and Spain, respectively.

They will play the winner of the third-seeded match between Desirae Krawczyk and Neal Skupski in the quarterfinals.

Ariel Behar and Makoto Ninomiya of Uruguay and Japan were eliminated in the second round by the Indian combo, who then moved to the quarterfinals with a 6-4, 7-6(11-9) victory over them on Monday night.

For Mirza, 36, this year’s Australian Open will be his final appearance in a Grand Slam tournament. After competing in the WTA Dubai Championships in February, the six-time Grand Slam doubles winner (three women’s and three mixed) will retire later this season.

The Indian duo got off to a great start in their second round encounter, breaking the opponent’s serve early on.

Behar-Ninomiya, though, rallied to tie the score at 2-2.

After being broken once more, Mirza-Bopanna went on to win the set and the match by a score of 6-4.

In the second game, the scores were much closer. Mirza and Bopanna broke serve at 3-3, but their Uruguayan and Japanese opponents broke right back to force a tiebreaker.