Not only did Los Blancos equal the record for most consecutive Champions League titles won by a single team, but they also extended the record of most European trophies won by a club (13).
Should they be successful once again this year, they will set a new record of being the first team in history to win four consecutive Champions League trophies (not to mention their fifth in six years).
Most consecutive Premier League title wins - Man Utd (3)
When the Red Devils won the Premier League for a third straight season in 2009, they equalled their own record for most consecutive league titles won by a club (which they set themselves between 1998 and 2001).
In doing so, they stretched the record of most top-flight titles won by a team in England to 20. They surpassed the record set by Liverpool in 1990 of most top-flight wins when they clinched their 19th title in 2011, thus leading them to adopt The Courtneers’ hit song ‘Not Nineteen Forever’ as their anthem of celebration.
Longest unbeaten league run - Steaua Bucharest (104)
The Romanian side’s 1986 European Cup victory against Barcelona marked the start of an incredible run that saw them go 104 domestic games undefeated, starting from June 1986 to September 1989, setting a world record in the process.
They went on to win consecutive Liga 1 titles during that remarkable era while they also hold the record for most Romanian top-flight titles won (26).
Longest-serving players at one club - Paolo Maldini & Francesco Totti
True one-club men are one in a million, and the football world must have done something right to bear witness to the greatness of Paolo Maldini and Francesco Totti for AC Milan and Roma, respectively.
The Italian legends are currently the longest-serving one-club men (from the top-five European leagues), with both careers spanning a momentous 25 seasons each.
Maldini has registered more Serie A appearances (647) than Totti (619), but both are just two of a rare breed of footballers who have pledged their entire senior careers to one club.
Longest run of games scored in - Real Madrid (73)
Is there a record that Real Madrid have not managed to challenge, or match? Los Blancos equalled Santos’ record of the longest run of games scored in (73) during the 2017-18 season, though failed to surpass it outright when they lost 1-0 to Real Betis in September 2017.
Still, it is an incredible achievement, as it marked the first time that the side failed to score in a match for nearly 17 months.
Longest-serving manager - Guy Roux (44 years)
If you thought Arsene Wenger’s 22-year reign at Arsenal was extreme, you haven’t heard of Guy Roux.
The Frenchman was in charge of Auxerre for an astronomical 44 years, though the record does have some loopholes. Roux had various short breaks from being Auxerre coach in 1962 (when he was enlisted to do national service) and in 2000 (when he took over as general manager for a short time).
He did, however, earn a legacy of turning Auxerre into a footballing giant across 44 years while the club also earned a reputation as a club that spawned eventual world-renowned talents such as Eric Cantona, Laurent Blanc and Djibril Cisse.
Under Roux, the French side won the title in 1996 as well as a few Coupes de France.
Most titles won by an individual player - Ryan Giggs (13)
Man Utd probably would not have tasted an inch of their success from the late ‘90s to mid ‘00s if it weren’t for the legendary Welshman. Giggs has almost broken as many records as his club has on an individual basis, with an astonishing record 13 Premier League titles to his name.
That’s not his only feat. He’s also appeared in the most Premier League seasons (22) and scored in the most Premier League seasons (21). He also holds the league record of registering the most assists of all-time (162). Take a bow.
Most points in a Premier League season - Manchester City (100)
Pep Guardiola’s second season in charge of the Sky Blues, though a title-winning one, failed to realise two fairytales.
First, they were unable to match Arsenal’s fabled ‘Invincibles’ record as their unbeaten streak was ended by Liverpool in January. They then failed to clinch the league title on home turf in April against rivals Manchester United when they shockingly lost 3-2.
Nevertheless, Guardiola’s side were a ferocious beast in the 2017-18 season, and broke a Premier League record of the most points won in a single campaign (a perfect 100). In doing so, they beat the record of 95 points accumulated in the 2004-05 season won by Jose Mourinho’s Chelsea.
Most consecutive wins across all competitions - New Saints FC (27)
Welsh Premier League side New Saints set a record for the most consecutive football wins across all competitions (27) between August 14 and December 14, 2016, breaking the previous record held by Ajax which was in place since 1972 (26 victories).
TNS won their first 21 league games in the 2016-17 season as well as matches in the Welsh Cup, League Cup and Challenge Cup games to set their record, which can only be claimed by a club competing in their nation’s top-flight league.
Longest unbeaten run across all competitions - Celtic (62)
Celtic set the record of longest unbeaten runs in all competitions more than a century ago, with their run of 62 games.
The best record since the introduction of European competition, however, is held by Benfica. Under Lajos Czeizler and then Elek Schwartz, a team that included Eusebio managed 48 games unbeaten between December 1963 and February 1965.