Confirmed: Tennis Star Anna Kournikova Joining 'The Biggest Loser' As Trainer

Anna Kournikova steps out at the Grand Opening Celebration of JW Marriott Marquis in Miami, Florida on November 4, 2010 Anna Kournikova steps out at the Grand Opening Celebration of JW Marriott Marquis in Miami, Florida on November 4, 2010

Anna Kournikova is ready to make them sweat!

The tennis star and former Sports Illustrated swimsuit cover girl is joining NBC’s “The Biggest Loser” as a trainer, the network announced during the show’s season finale on Tuesday night.

The blonde beauty and longtime girlfriend of pop star Enrique Iglesias will step in to help replace trainer Jillian Michaels, who is leaving to focus on her longtime dream of adopting a child.

Anna will join trainer Bob Harper and host Alison Sweeney on the hit NBC series.

However, Anna is no stranger to “The Biggest Loser.”

In October 2010, she visited the show as a celebrity guest and led the contestants through a tennis-themed workout challenge.

The 29-year-old beauty, who was born in Moscow, made her grand glam slam debut in 1996 at the U.S. Open. Anna peaked in her tennis career at No. 8 in 2000.

While she never made it to the top in tennis, she made herself a fixture in men’s magazines over the years, as well as in People’s annual Most Beautiful issues in 1998, 2000, 2002 and 2003.

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