Australian Open: Stan Wawrinka came from behind to beat World No. 4 Daniil Medvedev 6-2, 2-6, 4-6, 7-6 (7/2), 6-2 in five intense sets.
World number four Daniil Medvedev eased past Alexei Popyrin in straight sets on Saturday to set up a last-16 clash with former Australian Open champion Stan Wawrinka.
Daniil Medvedev overcame a nosebleed and stiff resistance from Spanish qualifier Pedro Martinez to enter Australian Open third round.
Defending champion Novak Djokovic insisted there are no clear favourites for the next week's Australian Open despite his ominous start to the season.
Novak Djokovic battled past fifth-ranked Daniil Medvedev 6-1, 5-7, 6-4 to send Serbia into the inaugural ATP Cup final.