Hat-trick heroes: Ronaldo Nazario vs Manchester United

Despite Ronaldo's hat-trick, the match ended 4-3 in favor of the home side Manchester United, but Real Madrid had won 3-1 in the first leg at the Bernabeu.

Real Madrid Brazilian football player Ronaldo smiles during a press conference 02 March 2004 in Madrid. Ronaldo has extended his contract at Real Madrid two years to 2008, the club announced today. AFP PHOTO/ Pedro ARMESTRE

On April 23, 2003, Old Trafford was host to one of the great individual performances, as Ronaldo Nazario fired Real Madrid into the Champions League semifinals with a sublime hat-trick against Manchester United. The match ended 4-3 to United, but Real had won 3-1 in the first leg at the Bernabeu.