“You can speak about it enough, and get told you've got the wrong tactics. But it's not the wrong tactics - it's just people not doing their job very well.
“We haven't for three games, but we did today.”
Root reached a strike rate of 100 plus only deep into his innings.
Cook said: “It was a fantastic hundred ... to score a run-a-ball on that wicket. You saw a lot of the other guys struggle to do that. He played beautifully.
“If we do that, we're a tough side to beat.
“It's very easy talking about it - everyone knows about it - but actually doing it is a lot harder.”