31 May 1972 - Ajax Sets The Standard

On 31 May 1972, Ajax won the second of three straight European Cups, beating Inter 2-0 with both goals coming from Johan Cruyff.

The reigning European Cup champions, Ajax had already claimed a domestic double that season, winning both the Eredivisie and the KNVB Cup. Cruyff, the 1971 Ballon d'Or winner, had finished the season as the league's top scorer with 25 goals.

Inter, meanwhile, after winning the tournament in 1964 and 1965, were back in it for the first time since finishing as runners-up to Celtic in 1967, and were hoping to redeem their season after finishing a disappointing fifth in Serie A.

The two teams met at De Kuip in Rotterdam, where a partisan crowd of 61,354 gathered for the event. They were rewarded with what some commentators described as "Total Football's greatest moment," as the free-flowing and constantly-shifting Ajax side unlocked Inter's defensive catenaccio formation, with Cruyff scoring in the 47th and 78th minutes.

Ajax repeated as champions in 1973, then again in 1995, while Inter claimed a third title in 2010.

16 December 1990 - Guardiola Adds Pep To Barça's Step

On 16 December 1990, 19-year old midfielder Josep "Pep" Guardiola made his Barcelona debut in a 2-0 win over Cádiz.

Having joined the club's youth academy seven years earlier, Guardiola started as a right midfielder before manager Johan Cruyff saw him in a reserve match and moved him to a central position. He quickly adapted to his new responsibilities and was called up to the first team for a friendly against Banyoles in May 1989.

Then, in December 1990, Cruyff gave Guardiola his competitive debut in a league match at home against Cádiz. A crowd of 75,000 witnessed the occasion, causing the young midfielder to suffer a small bout of nerves while waiting to take the pitch. But once there, he played well with a grit and determination not to make a mistake (he did pick up a yellow card in the 33rd minute for a foul on an opposing player).

Barcelona won the match 2-0 with goals from Txiki Begiristain and José Maria Bakero, then went on to win the league. Guardiola made only four other appearances that season, but established himself as a regular the following year and helped the team to another five league titles, two Copa del Rey trophies, and one European Cup before leaving for Brescia in 2001.

He returned to the club in 2007 as an assistant manager, then took full reins of the team from 2008 to 2012, winning another fourteen trophies including three league titles and two Champions League trophies.

14 December 1986 - The Debut Of Dennis Bergkamp

On 14 December 1986, Dennis Bergkamp made his professional debut, coming on as a late substitute for Ajax against Roda JC.

Born in Amsterdam in 1969, Bergkamp joined the club's youth academy in 1981. He was 17 when he made that first professional appearance at home against Roda, as manager Johan Cruff subbed him in for Rob Witschge in the 66th minute. Ajax were already up 2-0 at the time and that turned out to be the final score.

The striker remained with the club for seven seasons, scoring 122 goals in 237 appearances across all competitions. Along the way, he won one Eredivisie title (1990), two KNVB Cups (1987, 1993), one UEFA Cup (1992), and one UEFA Cup Winners' Cup (1987) before moving to Inter for a transfer fee of £7.1 million.

He never settled at Inter and left after two seasons for Arsenal, where he regained his previous form. He went on to become one of the club's most highly regarded players, making 425 appearances and winning multiple league titles (1998, 2002, 2004) and FA Cups (1998, 2002, 2003, 2005) before his retirement in 2006.