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The world's leading tennis stars, including Roger Federer and Novak Djokovic, were given a guided tour of the iconic Houses of Parliament on Friday (November 10) ahead of the World Tour Finals.
The tournament begins in London on Sunday, but those participating attended a pre-show party at Westminster before things got underway.
Speaker of the House of Commons, John Bercow, was on hand to show the players around.
World number one Djokovic was also awarded a trophy to mark his return to top spot.