Boris Johnson has said he is not confident he will beat Pippa Middleton at table tennis.
The Duchess of Cambridge's sister challenged the London mayor to a match in an article for The Spectator. He has offered her an invitation to join him for a game.
Speaking from Ealing Studios the Mayor of London said it is a great opportunity to promote sports for London.
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Its current five year licence comes to an end next Tuesday.
Extra armed police will guard major sporting events in London this weekend after the military was drafted in to protect key locations.