World number 15 and three-time Grand Slam champion Stan Wawrinka on Monday entered the Australian Open round of eight defeating world number four Daniil Medvedev. Wawrinka won 6-2, 2-6, 4-6, 7-6 (7-2), 6-2 in a contest that lasted three hours and 25 minutes. This was his 29th five-set victory in his 51st career five-setter.