Top of the world! Tomorrow, @carowozniacki takes her place atop of the @WTA rankings as the new World No. 1! Send your congrats with a 👏 for the newest Grand Slam Champion! 📸: @rogerscupto #USOpenSeries _ #wta #tennis #sports #wozniacki #instatennis #instasports #grandslam #rogerscup #usopen