Russian President Vladimir Putin, left, and Germany's former Chancellor Gerhard Schroeder attend an economic forum in St.Petersburg, Russia, Thursday, June 21, 2012. (AP Photo/Dmitry Lovetsky, pool)
Russia's Ksenia Pervak returns the ball to compatriot Maria Sharapova during the first round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Monday, May 26, 2014. (AP Photo/Michel Euler)
Russia's Maria Sharapova returns the ball to compatriot Ksenia Pervak during the first round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Monday, May 26, 2014. (AP Photo/Michel Euler)
Russia's Maria Sharapova serves to compatriot Russia's Ksenia Pervak during the first round match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France, Monday, May 26, 2014. (AP Photo/Michel Euler)