Tennis ace and model Anna Kournikova has stepped down as a celebrity coach on hit weightloss show "The Biggest Loser."
 
The stunning sportswoman has announced she will not be returning for the 13th season of the program.
 
Kournikova, who is singer Enrique Iglesias' longtime partner, was a popular addition to the coaching team on the show when she signed up for the 12th season at the beginning of 2011.
 
A statement from her reads, "Although I will not be returning as a full time trainer on season 13, I will always be a part of The Biggest Loser family and my commitment to bettering lives through health and fitness will continue."