LIVE: Follow our rolling Australian Open coverage as the remaining quarter-final places are filled MARIA Sharapova is gone, Victoria Azarenka and Rafael Nadal are through, now all eyes turn to centre court for Roger Federer v Jo-Wilfried Tsonga. The Swiss and the Frenchman will do battle in the pick of the fourth-round games, the start of which has been delayed due to the late finish of Nadal's three-set slog against Kei Nishikori, the Spaniard eventually prevailing 7-6 7-5 7-6. Earlier today, Sharapova was outclassed by Dominika Cibulkova 4-6 6-4 6-1 in the first match on Rod Laver Arena.