China’s Li Na knocked out fourth seed Agnieszka Radwanska in straight sets to reach the semi-finals of the Australian Open.

Maria Sharapova faces her fellow Russian Ekaterina Makarova in the second women’s quarter-final of the day, after David Ferrer takes on his Spanish compatriot Nicolas Almagro.

Defending men’s champion Novak Djokovic meets Tomas Berdych in the night session at Melbourne Park. The Serb will be hoping to have recovered all his powers after a five-hour epic against Stanislas Wawrinka in the previous round.