Roger Federer of Switzerland, returns the ball to Stanislas Wawrinka of Switzerland during the final match of the Monte Carlo Tennis Masters tournament in Monaco, Sunday, April 20, 2014. (AP Photo/Michel Euler)
Stanislas Wawrinka of Switzerland, returns the ball to Roger Federer of Switzerland during the final match of the Monte Carlo Tennis Masters tournament in Monaco, Sunday, April 20, 2014. (AP Photo/Michel Euler)