25 May 1967 - The Lisbon Lions Roar

On 25 May 1967, Celtic became the first British club to win the European Cup, beating Inter 2-1 in Lisbon. Notably, fourteen of Celtic's fifteen players and coaches were born within 10 miles of Celtic Park.

Inter won back-to-back European Cups in 1964 and 1965, then defeated defending champions Real Madrid in the 1967 semifinals to reach their third final in four years. Celtic, meanwhile, were in the tournament for the first time.

In just the seventh minute, the referee awarded Inter a penalty when Celtic right back Jim Craig fouled forward Renato Cappellini in the box. Sandro Mazzola converted the ensuing kick to put the Italians up 1-0, allowing them to pull back into their defensive catenaccio formation favored by manager Helenio Herrera.

And it worked, for a while. But in the 63rd minute, Craig sent the ball in for Tommy Gemmell, who beat the Inter keeper Giuliano Sarti to draw Celtic level. Then, in the 84th minute, they took the lead when Stevie Chalmers scored the winner. Afterward, manager Jock Stein delivered a not-so-veiled criticism of Inter's defensive style, saying "We did it by playing football; pure, beautiful, inventive football. There was not a negative thought in our heads."

Celtic returned to the final in 1970, but lost to Feyenoord. Inter made it there twice more, losing to Ajaz in 1972, but beating Bayern Munich in 2010.

26 April 1903 - Madrid Gets Athletic

On 26 April 1903, a group of students founded Atlético Madrid. They have since become one of Spain's most successful clubs, winning the league and the Copa del Rey nine times each.

The initial group of students consisted of Basques who were Athletic Bilbao and who considered the new club to be a Bilbao youth affiliate. They called the new club Athletic Club de Madrid and even adopted Bilbao's blue and white stripes, though they changed to their current red and white stripes by 1911 (reportedly attributable to their purchase that year of shirts from Southampton FC).

They joined La Liga in 1928, but were relegated to the Segunda División two years later. A few ups and downs later, and a merger with Zaragoza's Aviación Nacional, they returned to the top flight for the 1939-40 season and proceeded to win two straight titles. They won two more in 1950 and 1951 under manager Helenio Herrera. They have since added five more, including their most recent one in 1996, part of a league and Copa del Rey double that season.

Atlético have also enjoyed success in Europe. They won the Cup Winners' Cup over Fiorentina in 1962 and reached the European Cup final in 1974 (where they lost to Bayern Munich). In 2010, they won the Europa League final over Fulham, then claimed the UEFA Supercup by beating Inter 2-0.