Kevin Pietersen trudges off for 26, England v Australia, 4th Investec Ashes Test, Chester-le-Street, 1st day, August 9, 2013© Associated Press
Alastair Cook had to work hard for his half-century, England v Australia, 4th Investec Test, Chester-le-Street, 1st day, August 9, 2013© Getty Images
Alastair Cook padded up to Jackson Bird for 51, England v Australia, 4th Investec Test, Chester-le-Street, 1st day, August 9, 2013© Getty Images