16-Slams winner Serena says she has not peaked

Serena Williams of the US poses with her trophy and runner-up Maria Sharapova (L) of Russia after winning the French Open tennis tournament at the Roland Garros stadium in Paris June 8, 2013. Serena Williams proved an irresistible force once more as she powered past Maria Sharapova 6-4 6-4 to win the French Open for the second time on Saturday - 11 years after her first triumph. [Photo/Agencies]