Football clubs from Superleague Greece have participated in European football competitions since 1959, when Olympiacos took part in the European Cup. In total, twenty Greek clubs have taken part in European competitions. Panathinaikos' run to the 1971 European Cup Final is the biggest achievement by any Greek club.AEK Athens are the only Greek team to have reached the semi-final of the UEFA Cup, in 1977. Greek clubs have reached the quarter-final of major European competitions on another twelve occasions.