No.2 seed Bianca Andreescu, No.4 seed Petra Martic and No.8 seed Danielle Collins all booked their places in the quarterfinals on Tuesday without dropping a set. Andreescu had endured a late-night longueur on Monday in her opener, battling birds overhead, bugs underfoot and Madison Brengle across the net before surviving 7-6(4), 4-6, 6-3.

