NEVER doubt @rafaelnadal. The #USOpen defending champion pushes through a 4 set battle with K. Khachanov 5-7, 7-5, 7(9)-6(7), 7(7)-6(3) to book a spot in the R16. Send a #vamosrafa with a 🔥. 🎥 @skinnywashere __ #atp #tennis #rafaelnadal #instatennis #instaspain #instasports #usopen50 #rafa