I read on a French online shop (can't post link here for obvious reason) that the grey/pink polo is for "Night session", and the blue one for "Day session".
If it's true, it's been a long time since Federer have 2 outfits for the AO. I think it would be great
Then... I wonder which shoes will he wear with the BLUE polo ???
(I really can't imagine the anthracite/pink V9 with the blue polo...)
So far, the available spring colorways are anthracite/pink (AO), and orange/white (post-AO)...