In the Wimbledon Tennis Championships today, Serena Williams of US, will lock horns with Luxembourg's Mandy Minella in first round of Women's Single in London.<br/><br/> Novak Djokovic of Serbia will play against Germany's Florian Mayer, while David Ferrer of Spain to clash with Martin Alund of Argentina in the first round of Men's Singles.<br/><br/> Yesterday, Spaniard Rafael Nadal made a shocking opening round exit from the Championships, in the biggest upset of the season's third Grand Slam.<br/><br/>