Notable Champions of World Tour Finals Author:SI StaffPublish date:Nov 27, 2011Notable Champions of World Tour Finals Roger Federer Toby Melville/Reuters Novak DjokovicNicolas Luttiau/Presse Sports/US Presswire Lleyton Hewitt Claro Cortes IV/Reuters Pete Sampras Christof Stache/AP Andre Agassi Joachim Herrmann/Reuters Ivan Lendl Manny Millan/SI Boris Becker Karl-Heinz Kreifelts/AP John McEnroe Walter Iooss Jr./SI Bjorn Borg Walter Iooss Jr./SI Jimmy ConnorsWalter Iooss Jr./SI Ilie NastaseTony Triolo/SI Guillermo Vilas Andy Hayt/SI Stan Smith Lane Stewart/SILatest NewsNovak Djokovic Suffers Unexpected Defeat in Indian Wells vs. 20-Year-Old Luca NardiTennis Q&A: Anti-Doping Lawyer Howard Jacobs on Simona Halep’s CaseRafael Nadal Withdraws From Indian Wells Before Playing in First RoundMailbag: The Aftermath of Andrey Rublev’s On-Court Outburst and DefaultSimona Halep’s Ban Reduced: What It Means for Tennis’s Anti-Doping Policy