Barry Klarberg managed what Russian former professional tennis player?
Barry Klarberg: Barry J. Klarberg (born March 4, 1961), CPA, is an American businessman. Barry Klarberg:  Klarberg has managed several prominent individuals including musician/actor Justin Timberlake, entrepreneur Russell Simmons, DJ and record producer Kaskade, NASCAR champion Kyle Busch, professional tennis player/model Anna Kournikova, NBA All-Star Kyle Lowry, MLB All-Star and Homerun Champion José Bautista, MLS All-Star and Captain of the United States men's national soccer team Michael Bradley, and NHL Hall-of-Famer Mark Messier. Anna Kournikova: Anna Sergeyevna Kournikova (Russian: А́нна Серге́евна Ку́рникова ; ] ; born 7 June 1981) is a Russian former professional tennis player.
Anna Kournikova