Financial services company Deloitte recently published their 17th Football Money League, in which they rank the earnings of the world's top clubs from the 2012-13 season.
The report finds that the top 20 clubs saw a collective increase in revenue of eight percent (£4.4 billion) in the last campaign, but several teams near the top actually experienced a drop in earnings.
Here are the 20 richest clubs in world football, ranked as per Deloitte's criteria...
In a week where they mourned the passing of former manager Luis Aragones, Atletico Madrid topped La Liga for the first time since 1996 with a resounding win over Real Sociedad.
According to Deloitte, they brought in £102.8 million last season, thanks in part to successful Copa del Rey and UEFA Super Cup campaigns.
Despite going without silverware since their Coppa Italia win of 2008 and only filling about half of the seats at the Stadio Olimpico last season, Roma brought in £106.6 million.
Their hopes for a long-awaited new stadium were boosted in December when club officials met with the mayor.
Fenerbahce didn't even make the top 30 of Deloitte's last Football Money League, but they have shot into 18th place this time with revenues of £108.3 million.
Fener won the Turkish Cup and made it all the way to the Europa League semi-finals, but the 44 percent of their revenue came from commercial deals.
Hamburger SV climbed one spot in Deloitte's ranking this year, despite featuring in no European competitions. In fact, they are the highest-ranked team not to play in any continental tournaments.
Die Rothosen made £116 million last season, with 50 percent of that figure coming from commercial deals and only 18 percent from broadcasting.
When it comes to TV rights, German clubs are at a disadvantage: According to ESPNFC's Raf Honigstein, the Bundesliga earns the same amount from broadcasting globally that the Premier League does only in Singapore (€75 million).
This is the first year in which two Turkish teams have broken the Deloitte top 20, with Galatasaray reaping £134.6 million in 2012-13.
Gala are trailing behind their Istanbul rivals Fenerbahce in the Turkish Super Lig at the moment, but their lucrative spot in the Champions League next season is all-but assured with Fener serving a European ban for match fixing.
Inter Milan were eighth on the Deloitte list two years ago, but have slipped down in direct correlation with their Serie A decline.
The Nerazzurri made £144.6 million last season, with the bulk coming from TV rights. Just 12 percent of their revenue came from matchday receipts, owing to the fact that they play in the municipally-owned San Siro and fill it to around 50 percent capacity.
New owner Erick Thohir hopes to build a new stadium for the club to grow revenue in this area.
With a fifth-place finish and their eleventh Europa League/UEFA Cup campaign, Spurs enjoyed another prosperous season in 2012-13.
They made £147.4 million, which doesn't include the record fee acquired for Gareth Bale. But it does include £62.3 million of broadcasting revenue, boosted by the Premier League bumper TV rights deal.
The second of four Bundesliga clubs to make the top 20, Schalke generated £169.9 million in revenue last season, thanks to a decent run in the Champions League and nearly £77 million in commercial deals.
Liverpool were within the top 10 of the previous two rich lists, but slip to 12th place this year with £206.2 million—despite the fact that this represents a £6 million increase in revenue year-on-year.
The Anfield side's numbers were boosted by their £300 million kit deal with Warrior Sports.
Germany's second richest club is Borussia Dortmund, whose 2012-13 revenues hit £219.6 million.
A run all the way to the Champions League Final helped bring in broadcast earnings of £73 million. They reaped around £56 million more total revenue than the previous year, when they were also ranked 11th.
Milan rank five places higher than their San Siro rivals Internazionale, with earnings of £225.8 million in 2012-13.
The Rossoneri's average attendance was only around 2,000 higher than Inter, but they brought in an extra £5.8 million on matchdays, and made around £25 million more from commercial deals.
Given Milan's underwhelming league performance and unlikely European qualification this season, it seems like the tables will turn in next year's list.
Italy's richest club is the one on course for its third consecutive scudetto: Juventus.
The Old Lady reaped £233.5 million last season, with an incredible 61 percent of that coming from TV rights.
Serie A doesn't make public the amount clubs gets paid for broadcasting, but a recent leaked document showed Juve earned the most, due to their nationwide level of support.
Revenue increased by nearly £64 million comapred to last year's rich list figures.
Arsenal drop from sixth in the last rich list to eighth, with a £5 million decrease in revenue. The Gunners brought in £243.6 million in 2012/13.
Unsurprisingly, the club with the most expensive tickets in England made 38 percent of their revenue from matchdays, making it their largest source of income. This is an oddity among the rich list top 20.
Chelsea doesn't exactly have cheap running costs, but they made £260 million last season—a decrease of £6 million from the previous year.
The Blues made £17 million more from broadcasting then Arsenal and around £20 million more from commercial deals, but £23 million less from matchday revenue, due to the size of Stamford Bridge.
Nouveau riche title contenders Manchester City overtook Chelsea with their astronomical wage bill last season, and they also leapfrogged their new-money rivals in the rich list. The Citizens made £271 million last term, an increase of around £35 million on the previous year.
City made far more than Arsenal and Chelsea in commercial revenue, but less than half of what The Gunners made from matchdays (£39.6 million compared to £92.8 million). This can be attributed to a smaller stadium size and cheaper ticket prices outside of London.
Paris Saint-Germain were nowhere near the rich list top 20 last year, but their first Ligue 1 win in 19 years, a decent Champions League run and a series of lucrative sponsrship deals have put them among the elite.
The Parisians made £348.1 million last year. A large bulk of this revenue came from their controversial €200 million sponsorship deal with the Qatar Tourism Authority, giving them the highest commercial revenue in football (£218.3 million). The deal will certainly help them meet Financial Fair Play requirements, given that their budget last year was €430 million (as per ESPNFC).
Manchester United's on-field success and strong domestic and global support led to revenue of £363.2 million last season, a rise of around £35 million year-on-year.
However, the Red Devils are losing pace in the financial stakes as well as on the field: The Guardian report that this is the first time they have slipped out of the Deloitte top three since 1997.
Forty-two percent of Utd's earnings come from their shameless pursuit of international commercial deals. How many other clubs do you know that have an "official diesel engine supplier"?
Manchester Utd's top-three spot has been usurped by world champions Bayern Munich. Despite operating in a league where TV rights are lower and ticket prices are considerably cheaper, Die Roten pulled in £363.2 million in their treble-winning campaign.
This is their highest rich list placing in 11 years—and they show no signs of slowing down.
Barcelona have earned more than Manchester United in the past nine seasons, due in part to the fact that they and Real Madrid negotiate their own TV rights deals in Spain. According to CNN, the two clubs make 50 percent of the TV revenue between them, splitting the other 50 percent between the rest of the league.
Barca made £413 million last season, a figure that was subsequently strengthened by the €96 million sponsorship deal with Qatar Airways that was announced in August.
For the ninth consecutive year, Real Madrid are the richest club in the world.
Deloitte puts Los Blancos' earnings at £444.7 million, despite picking up no trophies last season. Forty-one percent of that revenue came from commercial deals, with the aforementioned Spanish TV rights deal gifting them €140 million (as per The Guardian).