I'm not sure if he's wearing that as his AO outfit, he's got a grey version instead...
Edit: No, you may be right. RF had some 'chose the sneakers I wear' competition, and since the chosen kicks are blue - he's probably decided he's going to wear the AO-2010 like tee instead of his grey shirt with the black/pink V9's...
Q: How close are you and Djokovic?
Murray: Well he's in Dubai and I'm Doha, so around 450kms