I'm not sure if you all Grigor fans know already, but he's donated some of his stuff for charity auction that Kei Nishikori is doing. It's as if he stripped there.
There are his hat, shirt, shorts, shoes, and some others. If you haven't, please go check them out at http://www.tennisaceauctions.com/
Wow, how nice of him! He is really lovely, he obviously jumped at the opportunity to contribute.