Nadal, Williams into Australian Open quarter-finals

Rafael Nadal struggled into his first Grand Slam quarter-final since 2015 at the Australian Open on Monday, as Serena Williams accelerated towards a record title and the number one ranking. Nadal, searching for a revival after injuries wrecked last season, was tested by France's Gael Monfils before winning 6-3, 6-3, 4-6, 6-4 to book a last-eight clash with Milos Raonic. Nadal, 30, was also pushed to five sets by Alexander Zverev, 19, in round three, but he has survived to reach his first major q