Second-seeded Karolina Pliskova, a finalist at last year's US Open, had no trouble beating 86th-ranked Madison Brengle 6-1, 6-3 to get to the third round.
Australian Open 2017: Karolina Pliskova sets up Round 4 clash with Daria Gavrilova after nail-biting win
Fifth-seed Karolina Pliskova survived a huge scare on Saturday, scrambling into the Australian Open fourth round after battling from a set down in a marathon match.
Australian Open hopeful Nick Kyrgios played down another injury scare after his Hopman Cup win over Adam Pavlasek in Perth on Tuesday.
Top-seeded Svetlana Kuznetsova retained her Kremlin Cup title on Saturday with a straight-sets win over Australian Daria Gavrilova in the final to claim the last spot in the season-ending WTA Finals in Singapore.
A wrist injury killed off Carla Suarez Navarro's hopes of qualifying for the WTA Finals as she retired while facing Daria Gavrilova in the Kremlin Cup.
Hong Kong Open: Caroline Wozniacki faces Kristina Mladenovic in final after beating defending champion
Former world number one Caroline Wozniacki fought her way to the Hong Kong Open finals Saturday after beating defending champion Jelena Jankovic.
Top seed Serena Williams gave up a wild card entry into the ATP-WTA Cincinnati Masters tournament on Monday after complaining of a shoulder injury.
World number one Novak Djokovic was handed a blockbuster Olympics opener on Thursday when he was drawn to face Juan Martin del Potro, who beat him for bronze at London in 2012.
Seventeen-time Grand Slam champion Roger Federer will play for Switzerland in the mixed-team Hopman Cup in Perth early next year, organisers said on Thursday.
India's Leander Paes and his Swiss partner Martina Hingis moved a step closer to their first French Open crown together as they breezed into the mixed doubles quarter-finals after dispatching fourth seeds Yaroslav Shvedova and Florin Mergea, in Paris on Saturday.
Second seed Maria Sharapova suffered a shock 7-6(4) 6-3 defeat to compatriot and wildcard Daria Gavrilova in the second round of the Miami Open on Thursday.