PHIL TUFNELL left fans impressed as he managed to keep a straight face after what appeared to be a crude moment during commentary.

England were taking on Sri Lanka at the Old Trafford cricket ground.

Tufnell, 58, was on duty for BBC‘s Test Match Special, covering the clash’s morning action.

During a conversation with co-host Jonathan Agnew, he was put through his paces so as not to break out in laughter.

Agnew said: “A new technique now. Don’t you remember we had fingering, well now its all about tonguing.

“Hard-tonguing, soft-tonguing and in between, so lots of tonguing going on at the moment.”

Tufnell calmly responded: “How do you do that then?”

Agnew then said: “Hard-tonguing is easier than soft-tonguing.”

To which, Tuffnell said: “Well I should imagine it is. You have a lot of things to think about.”

Agnew then said: “You’re fingering, you’re tonguing, you are all over the place.”

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Listeners were in shock that Tufnell managed to keep a straight face during the inadvertently crude conversation.

One posted: “I would die for you, TMS.”

A second wrote: “Has to be a setup.”

A third commented: “I don’t know how Tuffers kept a straight face.”

A fourth said: “TMS is just pure filth!!”

Another added: “Has to be the most composed man ever.”

But the conversation was all about how to play the euphonium – a brass musical instrument that is sounded by blowing into a mouthpiece and pushing valves.

England put in a fantastic performance during the opening stages against Sri Lanka.

The bowlers took three wickets for just six runs before the visitors batters put on a stand to get up to a respectable score.