UEFA Champions League | 1968 | 1968 Summer Olympics | Euro | UEFA Europa League | UEFA | UEFA Euro 2012 | UEFA Euro 2008 | UEFA Cup Winners' Cup | 1968 in music | 1968 Winter Olympics | Catholic University of Leuven (1834–1968) | United States presidential election, 1968 | UEFA Euro 1980 | UEFA Euro 1996 | euro | Basketball at the 1968 Summer Olympics | Romeo and Juliet (1968 film) | UEFA Euro 2012 qualifying | UEFA Euro 2008 qualifying Group G | North American Soccer League (1968–1984) | 2004–05 UEFA Champions League | UEFA Euro 1984 | 2004–05 UEFA Cup | UEFA Euro 2000 | UEFA Euro 1988 | Planet of the Apes (1968 film) | 2012–13 UEFA Europa League | 2005–06 UEFA Champions League | 1978 FIFA World Cup qualification (UEFA) |
He was appointed to quarter-finals at both Euro 1968 and Euro 1972, and a semi-final at Euro 1968, as well as the opening group stage game between Mexico and the Soviet Union at the 1970 World Cup, which saw him become the first referee to show a yellow card in a match.