World number one Serena Williams, Briton Andy Murray and Stanislas Wawrinka will be seen in action in the quarterfinals of the US Open Tennis, the final Grand Slam of the season, today. In Men's Singles, World number one Novak Djokovic has stormed into the semi-finals. France's Gael Monfils also entered the last-4. In Women's Singles, second seed Angelique Kerber and Caroline Wozniacki have secured semi-final berths.