Caroline Wozniacki raced to a 6-4 6-3 win over Kiki Bertens of the Netherlands to set up a last 16 clash with 19th-seeded Slovakian Magdalena Rybarikova.
Nick Kyrgios earned a hard-fought 7-6(5) 4-6 7-6(6) 7-6(5) victory over France’s Jo-Wilfried Tsonga to reach the fourth round at Melbourne Park for the second time.The 17th-seed will face world number three Grigor Dimitrov next, following the Bulgarian’s victory over Andrey Rublev.
World number three Grigor Dimitrov avenged his second round defeat by Andrey Rublev at last year’s U.S. Open, beating the Russian 6-3 4-6 6-4 6-4 to book a place in round of 16.
Estonia’s 32nd-seed Anett Kontaveit knocked out French Open champion Jelena Ostapenko with a 6-3 1-6 6-3 win over the Latvian. She will take on Spaniard Carla Suarez Navarro.
Sixth-seed Marin Cilic beat American Ryan Harrison 7-6(4) 6-3 7-6(4) to progress to the fourth round for the first time since 2011. Croatian Cilic will meet Spanish 10th-seed Pablo Carreno-Busta in the next round.
Italian Andreas Seppi overcame big-serving Ivo Karlovic 6-3 7-6(4) 6-7(3) 6-7(5) 9-7 to reach the fourth round in Melbourne for the second consecutive year.
World number 11 Pablo Carreno Busta’s beat Giles Muller 7-6(4) 4-6 7-5 7-5 in the third round.
Briton Kyle Edmund beat Georgian Nikoloz Basilashvili 7-6(0) 3-6 4-6 6-0 7-5 in a long match.
Croatian Petra Martic reached the fourth round in Melbourne for the first time beating Thai qualifier Luksika Kumkhum 6-3 3-6 7-5.