Ringing in the New Year from around the world! These tennis stars are ready for 2018, are you? #USOpen (📸: @rogerfederer, @mariasharapova, @denis.shapovalov, @garbimuguruza, @aradwanska, @karenkhachanov) #atp #wta #tennis #nye2017 #nye #federer #sharapova #muguruza #shapovalov #radwanska #khachanov