Stan Wawrinka battles past Medvedev to set up quarter-final with Zverev

• Wawrinka ousts No 4 in five sets to reach last eight• Zverev beats Andrey Rublev in three sets Former champion Stan Wawrinka emerged from a mid-match loss of confidence to battle past the Russian fourth seed Daniil Medvedev to reach the Australian Open quarter-finals with a 6-2, 2-6, 4-6, 7-6 (2), 6-2 victory yesterday. Medvedev, 23, arrived in Melbourne after a 2019 season featuring four titles and a Tour-leading 59 match wins and came into Monday's contest against Wawrinka having won bot...