@rogerfederer and @belindabencic are @hopmancup champions! The dynamic Swiss duo start the year off with a big 🏆 with more hardware in their sites! Here's to a big 2018! (📸: Federer) _ #USOpen #wta #atp #hopmancup #rogerfederer #belindabencic #instatennis #swisstennis #instasports