Serena Williams raises questions over future after tearful farewell in Australia

Serena Williams waves goodbye at Melbourne Park – but for good? (Andy Brownbill/AP)

Serena Williams bade a tearful farewell to the Australian Open amid questions about whether she may have played at the tournament for the last time.

Williams gave the crowd inside the Rod Laver Arena a long wave goodbye with her hand on her heart following her 6-3 6-4 semi-final defeat by Naomi Osaka.