The match referee Chris Broad has advised Mohammad Aamer to take care when celebrating wickets, but no official action was taken after a clash between the bowler and Ricky Ponting on the first day at Lord's. As Aamer was following through having had Ponting caught at short leg, he ran close to the batsman and contact was made.

It was not the first time on this trip that Aamer collided with a batsman after dismissing him. In the second Twenty20 at Edgbaston, he leapt with such exuberance while celebrating the removal of Michael Clarke that he lost control and crashed into the batsman, although he immediately apologised.

Broad said there was no reason to take official action over the Aamer-Ponting incident, but he was keen to ensure there were no further repeats. The umpires spoke to the Pakistan captain Shahid Afridi after the collision and Broad raised the issue with Aamer and the team coach Waqar Younis at the close of play.

"Aamer is a young, exciting, talented player full of enthusiasm for this great sport and that is to be celebrated and nurtured," Broad said. "But there are a few things he still has to learn in relation to how to conduct himself on the field of play.

"I told him that when he takes a wicket, he should celebrate with his team-mates rather than getting himself into the personal space of the outgoing batsman. It's a spirit of cricket issue.

"It has happened twice now so we as a playing control team thought it would be sensible for me to have a word with him. He accepted it graciously and undertook to avoid a repeat occurrence. As far as we are concerned the issue is now closed."

Brydon Coverdale is a staff writer at Cricinfo