CHAMPIONS LEAGUE DEBUT: 2003
TEAM(S): Manchester United, Real Madrid

Either you love him or hate him. There's no indifference when it comes to Cristiano Ronaldo. But his performances in the Champions League suggest you'd better respect the man, or risk getting your favorite squad's dreams kicked in by the quick-footed forward. His 2007-08 campaign was one of the greats, and for it he earned his only FIFA World Player of the Year award. Even with van Nistelrooy, Veron, Beckham, and Rooney previously in the fold, Manchester United couldn't break through to Sir Alex's second final until the crusty Scot made the move to roll with CR7 as top dog. Consecutive finals appearances in 2008 and 2009 proved the Portuguese playboy was the truth, so much that Real Madrid paid a princely sum to lead their latest attempt at Champions League glory.