Anna Kournikova Joining “The Biggest Loser

We hear tennis ace Anna Kournikova is putting down her racket and picking up a bull horn to whip overweight reality stars into shape on the next season of NBC’s The Biggest Loser.The towhead sportswoman is expected to replace hardnosed trainer Jillian Michaels on the judges’ panel this fall. Michaels is leaving Loser after 11 season to focus on starting a family; she’s in the process of