Shouldn't be allowed to wear blue either. Clearly an attempt to blend in with the court surface.
Heh, just watching Tsonga-Blake, where Tsonga wears yellow shirt of almost same colour as the ball, and Blake wears blue shirt, almost same colour as the court
I've been wondering sometimes why the players won't take advantage of "camouflage colours", but I guess they do now? Blake kinda ruins the effect with his black shorts though - with his upper body blending with the court almost perfectly, it looks like there are pair of shorts running around...
edit: and Tsonga has also yellow shoes and yellow wristbands! He's really going all the way, and it seems to be working