Rafael Nadal remains on course for just a second Australian Open title after a four-set fourth-round victory over Diego Schwartzman.
World No 1 and top seed Nadal took the opener before dropping a set for the first time in the tournament as 24th seed Schwartzman leveled the contest via a second set tie-break.
However, it was the Spaniard who claimed the quarter-final place on offer, closing out the match, despite typical belligerence from his Argentine opponent, with a 6-3, 6-7, 6-3, 6-3 victory.
Also into the last eight is world No 3 and ATP Finals winner Grigor Dimitrov who beat home favourite Nick Kyrgios in four sets.
