Tennis legend Martina Navratilova has accused the Australian Open organisers of “capitulating” to Beijing after it banished pro-Peng Shuai fans from Melbourne Park for refusing to remove their shirts with messages of support for the Chinese doubles player. Footage emerged over the weekend of Tennis Australia’s security guards and Victoria police telling spectators to remove their “Where is Peng Shuai?” T-shirts and confiscating their banners. Tennis Australia (TA) defended its stance by saying although it feared for Peng’s wellbeing, the tournament ‘does not allow clothing, banners or signs that are commercial or political.’ Navratilova, the retired Czech who won 59 Grand Slam titles, said she thought Tennis Australia was “wrong” about the issue. “Sport has always been on the forefront of social issues, pushing them forward, and we are going backwards. I find it really, really cowardly,” she told Tennis Channel. “I think they’re wrong on this. This is not …