'I'm not worried': Roger Federer plays down air quality concerns at Australian Open - video

Roger Federer has been forced to defend himself against suggestions he has not done enough to help his fellow tennis professionals deal with the issue of bad air quality in Australia. The six-times Australian champion played down the dangers to the players compared with the people living in the region, saying he's 'not worried' about the air quality in Melbourne. Two weeks ago it was revealed Federer's sponsor, Credit Suisse, had invested heavily in fossil fuels Roger Federer backs Australian Op...