In March 2007, Michalík made a loan switch to Leeds United on a one-month loan deal. The defender's performances earned a great deal of credit from the Leeds faithful, particularly due to his match-winning goal on 7 April in a 2–1 victory over Plymouth Argyle. As a result of his strong performances, then Leeds manager Dennis Wise extended the Slovakian's loan deal until the end of the season, although Bolton recalled Michalik back due to a spate of injuries to their first choice centre-backs. Michalik played the rest of the season with Bolton and even managed to score against Chelsea at Stamford Bridge. During his spell back at Bolton, Leeds were relegated to League 1.