Alastair Cook needs runs to keep captaincy says Michael Vaughan

Former England captain Michael Vaughan says that Alastair Cook needs to make runs if he wants to keep his job after the five-match Test series against India.

He has not scored a Test century in over a year and is under pressure after his side have failed to win their past eight Tests.

Cook is England's fifth-highest Test run-scorer, with 8,125 runs, and has made 25 centuries in 104 matches since his debut in India in 2006.