When he’s not busy winning titles as the second-best tennis player in the world, Novak Djokovic is apparently quite the architecture aficionado. The Serbian athlete is reportedly a big fan of Renzo Piano; earlier this year he bought a unit in Piano’s Miami beach project Eighty Seven Park, and he’s now gone into contract for two condos in the starchitect’s under-construction NYC venture 565 Broome SoHo, where sales launched this past September.