December 5, 2013 -- Updated 1008 GMT (1808 HKT)
French tennis star Marion Bartoli's career had its ups and downs -- both personal and professional. Here she opens up about feeling like a "ghost" as a child and her surprise win at Wimbledon.
Maria Sharapova certainly had a memorable season. She started it well but then suffered hip and shoulder injuries. And when the Russian hired Sven Groeneveld this week, it marked her third coach of 2013.
"It could have been the secret to my success or the secret to my demise," a wistful Serena Williams says of her 2013 season.
Hitting partner Sascha Bajin and coach Patrick Mouratoglou offer a glimpse into the life of the world number 1.