 Maria Sharapova explained on Netflixs tennis documentary that a tennis journey is full of struggle and challenges but added that the great ones keep going even when it gets tough and difficult. Sharapova, a former five-time Grand Slam champion, was just 17 when she won her first Grand Slam title at 2004 Wimbledon. Even though ... Maria Sharapova on Netflix: In tennis, you lose so much more than... 