The Biggest Loser Anna Kournikova to appear on 'The Biggest Loser,' teach cast tennis 10/04/2010 Anna Kournikova will be seen teaching the contestants how to play tennis on an upcoming episode of the U.S. competition series "The Biggest Loser," NBC said. Read More RELATED NEWS 'The Biggest Loser' crowns Patrick House its tenth-season champion'The Biggest Loser' trainer Jillian Michaels leaving the show -- again'The Biggest Loser's Patrick House and Alfredo Dinten make finale TAGS: The Biggest Loser Anna Kournikova
