 Micheľ's first UEFA Champions League matches came in the 1998–99 season, including Manchester United's 5–0 win over Brøndby in the group stage.Up to the 2008 final, he refereed 55 Champions League matches (including qualifying), notably the second leg of the semi-final between Chelsea and Liverpool in 2005, in which Liverpool's Luis García scored a controversial goal, which Micheľ chose to allow.He was also selected to referee at the 2000 Summer Olympics, the 2002 and 2006 FIFA World Cups, and the European Championships in 2004 and 2008.