With Jillian Michaels out of the picture, could Anna Kournikova be taking her place? According to reports, the tennis star will join the NBC's 'The Biggest Loser' as a trainer next season.

Kournikova will join new trainers Cara Castronuova and Brett Hoebel as the show undergoes major changes in the wake of Jillian Michaels' departure from the hit show, X17 Online reports.

Michaels will serve as a co-host on 'The Doctors' and a correspondent on 'Dr. Phil.'

An official announcement regarding Kournikova's role on 'Biggest Loser' is expected after the show's season finale on Tuesday.

Kournikova, who recently put her $9.4 million Miami mansion on the market, is certainly no stranger in the fitness world.

A tennis player all her life, she debuted at the U.S. Open when she was just 15 years old and was named ESPN's Hottest Female Athlete in 2002.

The tennis star has been dating singer Enrique Igelsias since late 2001.