# Tennis: US Open champion Emma Raducanu has pulled out of an Australian Open warm-up tournament as she continues to recover from the coronavirus. The 19-year-old Briton was due to line up alongside defending Australian Open champion Naomi Osaka and former world number one Simona Halep at the Melbourne Summer Set WTA event from Tuesday. Raducanu tested positive for Covid-19 before an Abu Dhabi exhibition last month and spent time in isolation.