What a #Wimbledon run from @mackiemacster! The #USTennis up-and-comer credited his recent success to training at the USTA #NationalCampus. "It's paying off and I like being there." Leave a 💪 for Mackie's rising career! _ 💬: @usatoday #mackenziemcdonald #tennis #usta #orlando #ustaplayerdevelopment #teamusa #wimbledon #protennis #atp