AFC Ajax beat SL Benfica 3-0 in a replay to reach the last four after the teams each claimed 3-1 away wins. It was the competition's last replay as penalty shoot-outs were introduced for 1970/71.
• Playmaker Gianni Rivera wins the Ballon d'Or after inspiring AC Milan to the European Cup.
• Eddy Merckx wins the first of his five Tour de France titles by a record margin of 17.54.
• Neil Armstrong makes "one giant leap for mankind" by becoming the first man on the moon.
• Half a million turn up for three days of peace and music at Woodstock in upstate New York.