Novak Djokovic said he had been “hanging by a rope” before battling through to the Shanghai Masters last 16 with a 4-6, 7-5, 6-3 win over qualifier Yannick Hanfmann on Sunday. The 38-year-old Serb is looking to win a record-extending fifth title in Shanghai but was given a mighty scare by the 150th-ranked German. READ: