Novak Djokovic broke down in tears during a US Open first-round defeat by Argentina’s Mariano Navone which provided further evidence age is fast catching up with the 39-year-old great. Novak Djokovic broke down in tears during a US Open first-round defeat by Argentina’s Mariano Navone which provided further evidence age is fast catching up with the 39-year-old great. www.dailymirror.lk