A British police officer reacts as he watches a giant screen showing the second set tie-break in the men's singles final match between Serbia's Novak Djokovic and Switzerland's Roger Federer, on day thirteen of the 2015 Wimbledon Championships at The All England Tennis Club in Wimbledon, southwest London, on July 12, 2015.  RESTRICTED TO EDITORIAL USE  -- AFP PHOTO / LEON NEALLEON NEAL/AFP/Getty Images
{}