After 509 published picks this is (if i do not make a mistake) the first tennis pick. I had the chance to watch some games of Tsitsipas in the turnament and i was not surprized at all. Also yesterday in his post game statements (won Monfils 2-1) Tsitsipas said that was to close to retire as has some issues with his back. Keep in mind that Tsitsipas won Federed on Australian Open but after it Stefanos does not plays as used to do.