Angelique Kerber is through to the third round at Melbourne Park after a 6-2, 6-3 win over Beatrix Haddad Maia to open night play on Rod Laver Arena.
The first set took 47 minutes thanks to a marathon sixth game with Haddad Maia serving. It went nearly 14 minutes, featured 10 deuces and Kerber had six break points which were saved by the Brazilian qualifier.
Kerber, the 2016 Australian titlist, will next play Australian wild-card entry Kimberly Birrell, who had an upset 6-4, 4-6, 6-1 win over No. 29-seeded Donna Vekic.