Sir Alex Ferguson has confirmed that some Manchester United players do take sleeping pills, but that he leaves such matters for the team doctor to deal with.

The issue of what players take to get to sleep has become a discussion point after Glen Johnson revealed some players had taken Pro Plus tablets on Tuesday ahead of England's World Cup qualifier with Poland in Warsaw.

"I think some players do take sleeping tablets at night," said Ferguson. "I don't know which ones. There are all different types and some very mild ones. I leave it to the doctor."

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