Melbourne - World No.1 Rafael Nadal fought off tenacious Argentine Diego Schwartzman to win through to the quarter-finals of the Australian Open on Sunday.
Nadal was taken to four tough sets in almost four hours before winning 6-3, 6-7 (4/7), 6-3, 6-3 and will next play either Grigor Dimitrov or Nick Kyrgios in the last eight.
Results from the Australian Open on Sunday:
Marin Cilic (CRO x6) bt Pablo Carreno-Busta (ESP x10) 6-7 (2/7), 6-3, 7-6 (7/0), 7-6 (7/3)
Carla Suarez Navarro (ESP) bt Anett Kontaveit (EST x32) 4-6, 6-4, 8-6
Caroline Wozniacki (DEN x2) bt Magdalena Rybarikova (SVK x19) 6-3, 6-0
Elise Mertens (BEL) bt Petra Martic (CRO) 7-6 (7/5), 7-5