Serena Williams and Maria Sharapova both shook off recent injury problems to sail into the Australian Open third round with straight-set victories.

Tomas Berdych has reached the semi-finals of the Australian Open for the first time with a four-set win over third seed David Ferrer.

Rafael Nadal needed just one set to book his place in the second round of the Australian Open as opponent Bernard Tomic retired with injury.

Amelie Mauresmo breezed into the semi-finals at the Australian Open with a convincing 6-3 6-0 victory over Patty Schnyder of Switzerland.

History has been made with Gustavo Kuerten becoming the first Brazilian number one seed at a Grand Slam.