Alastair Cook facing biggest challenge -Michael Vaughan
Former England skipper Michael Vaughan states that Alastair Cook is facing the biggest challenge of his captaincy as he looks to get England back to winning ways.
Cook, whose leadership was criticised on the disastrous Ashes tour, will oversee one-day and Test series against Sri Lanka and India this summer.
Cook's captaincy began with England's first Test series victory in India for 27 years and a 3-0 Ashes victory on home soil in 2013.
But his reputation was scarred during a humiliating 5 - nil Ashes whitewash and 4-1 defeat in the one-day series down under.
