By Richard Kent, Staff Reporter FLUSHING, NY — Many say that he has never lived up to his raw potential. John McEnroe says that “the guy has got one of the greatest serves in the history of tennis.” That’s Australian Nick Kyrgios in a nutshell. Kyrgios knocked off No. 1 seed Daniil Medvedev 7-6, 3-6, […]Read more "Kyrgios upsets No. 1 Medvedev "