[1] Micheľ officiated at Euro 2004, taking charge of 3 games, including the quarter-final between Sweden and the Netherlands.

[5][6][7] After studying a series of still images of the incident, motion expert Dr. Mike Spann concluded that Micheľ had made the correct decision by signalling a goal.

[8] Micheľ was selected to be the referee of the 2008 UEFA Champions League final, the match between Manchester United and Chelsea.

Micheľ became only the second referee to give a red card in a UEFA Champions League final (the first being Terje Hauge in 2006) when he sent Didier Drogba off in extra time for a slap at Nemanja Vidić's chin.

He issued 8 yellow cards, sent a player off for diving, gave two penalties, and rejected a claim for one in the second half.

[12] Micheľ refereed the quarterfinals loss of Argentina to the hosts Germany, which was tied 1–1 and went into extra time and ended on penalty kicks.

Micheľ gave a red card to Argentina's unused substitute Leandro Damián Cufré for kicking Per Mertesacker during the post-game melee involving the two teams and some members of their coaching staffs.

On 27 October 2008, Micheľ signed a contract with Shakhtar Donetsk as the head of the international competitions department.