Novak Djokovic suffered a straight-sets defeat to Hubert Hurkacz on Friday, exiting the Shanghai Masters in his opening match just days after winning the China Open (Pics: AFP)

Novak Djokovic's US Open campaign ended in a five-set defeat to Mariano Navone. The 39-year-old fought heat and exhaustion before breaking down in tears as the Argentine dominated the fifth set. (Pics: AFP)