The Australian cricket great Shane Warne says Andrew Strauss must stop "missing a lot tactically" if England are to achieve their goal of becoming the world's best Test side.
He adds England has to be more ruthless if they were to leapfrog the likes of India and South Africa and become international cricket's top team.
Strauss became the first England captain to retain the Ashes in 24 years last week with an innings and 157-run victory over Australia in the fourth test in Melbourne.
That gave the tourists an unbeatable 2-1 lead heading into the fifth and final Test of the five-match series starting today in Sydney.
But, despite that achievement, Warne believes Strauss needs to improve his captaincy skills.
Warne wrote in his column in Britain's Sunday Telegraph newspaper that in Strauss, "they have a captain who is a leader of men and a wonderful spokesman for the team. He is a good citizen but I still think he misses a lot tactically and he has to get better for the team to reach No.1."