#USOpen stars from around the world celebrating #Christmas! 🎄(📸: @djokernole, @tsongaofficiel, @petra.kvitova, @mariasharapova, @tomasberdych) #atp #wta #tennis #merrychristmas #christmastree #novakdjokovic #tsonga #mariasharapova #tomasberdych #petrakvitova