Need proof that the #USTAProCircuit is the place to catch a rising star? @tsandgren largely competed it on last year, winning one title and reaching three finals before his inspired Australian Open quarterfinal run. Check out his best moments in the Challengers and send him a 🎾 if you’re cheering him on! #usta #tennyssandgren #sandgren #challenger #atp #tennis #protennis #instatennis #instasports #instawow