London - England captain Alistair Cook is convinced he has improved as a batsman despite failing to score a Test century since 2013.
The opener will attempt to reverse a run of low scores when England begin the second test against West Indies in Grenada on Tuesday, having managed only 24 runs in the drawn first Test.
"I did have a look back in early February, watched a little a bit and it has changed quite a lot," he told the BBC.