Sep 7, 2014; New York, NY, USA; Bob Bryan (USA) (right) and Mike Bryan (USA) after beating Marcel Granollers (ESP) and Marc Lopez (ESP) in the men's doubles final of the 2014 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Robert Deutsch-USA TODAY Sports
LONDON (Reuters) - Billed as an aperitif before the main course served up by the likes of Roger Federer and Novak Djokovic, the unsung doubles players have provided the real excitement at this week's ATP World Tour Finals.
World number one Djokovic and Federer have barely broken sweat to reach the semi-finals of the year-ending tournament - the former dropping nine games in three round-robin matches and his great Swiss rival offering up a mere 13.
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