Question: Barry Klarberg managed what Russian former professional tennis player?
Sentence (from "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.
Relevant evidence: Yes