Nick Kyrgios pulls out of Adelaide event to rest knee before Australian Open

World No14 taking course of cortisone for knee problem First grand slam of year begins in Melbourne next week A cloud remains over the fitness of Nick Kyrgios with less than a week to go before the Australian Open starts after a knee complaint forced the home favourite out of the World Tennis Challenge in Adelaide. Kyrgios revealed on Monday that he was taking the anti-inflammatory drug cortisone as he prepares for the first grand slam of the year in Melbourne, which starts next Monday. Related:...