This ranking was made by using data from Forbes and comparing the teams by the amount of revenue they generate (in US dollars).
No. 20 Napoli — $158 million
League: Serie A (Italy)
Location: Naples
2016-2017 record: 26-8-4, 86 points, third place
20th-richest NFL team: Arizona Cardinals, $370 million in revenue
No. 19 Leicester City — $191 million
League: Premier League (England)
Location: Leicester
2016-2017 record: 12-8-18, 44 points, 12th place
19th-richest NFL team: Miami Dolphins, $376 million in revenue
No. 18 Inter Milan — $199 million
League: Serie A (Italy)
Location: Milan
2016-2017 record: 19-5-14, 62 points, seventh place
18th-richest NFL team: Jacksonville Jaguars, $377 million in revenue
No. 17 West Ham United — $213 million
League: Premier League (England)
Location: London
2016-2017 record: 12-9-17, 45 points, 11th place
17th-richest NFL team: Carolina Panthers, $385 million in revenue
No. 16 AC Milan — $238 million
League: Serie A (Italy)
Location: Milan
2016-2017 record: 18-9-11, 63 points, sixth place
16th-richest NFL team: Minnesota Vikings, $392 million in revenue
No. 15 AS Roma — $242 million
League: Serie A (Italy)
Location: Rome
2016-2017 record: 28-3-7, 87 points, second place
15th-richest NFL team: New Orleans Saints, $395 million in revenue
No. 14 Schalke 04 — $249 million
League: Bundesliga (Germany)
Location: Gelsenkirchen
2016-2017 record: 11-10-13, 43 points, 10th place
14th-richest NFL team: Seattle Seahawks, $399 million in revenue
No. 13 Atletico de Madrid — $254 million
League: La Liga (Spain)
Location: Madrid
2016-2017 record: 23-9-6, 78 points, third place
13th-richest NFL team: Pittsburgh Steelers, $401 million in revenue
No. 12 Tottenham Hotspur — $310 million
League: Premier League (England)
Location: London
2016-2017 record: 26-8-4, 86 points, second place
12th-richest NFL team: Baltimore Ravens, $403 million in revenue
No. 11 Borussia Dortmund — $315 million
League: Bundesliga (Germany)
Location: Dortmund
2016-2017 record: 18-10-6, 64 points, third place
11th-richest NFL team: Denver Broncos, $411 million in revenue
No. 10 Juventus — $379 million
League: Serie A (Italy)
Location: Turin
2016-2017 record: 29-4-5, 91 points, first place
10th-richest NFL team: Chicago Bears, $416 million in revenue
No. 9 Liverpool — $448 million
League: Premier League (England)
Location: Liverpool
2016-2017 record: 22-10-6, 76 points, fourth place
Ninth-richest NFL team: Green Bay Packers, $421 million in revenue
No. 8 Chelsea — $497 million
League: Premier League (England)
Location: London
2016-2017 record: 30-3-5, 93 points, first place
Eighth-richest NFL team: Philadelphia Eagles, $430 million in revenue
No. 7 Arsenal — $520 million
League: Premier League (England)
Location: London
2016-2017 record: 23-6-9, 75 points, fifth place
Seventh-richest NFL team: New York Jets, $431 million in revenue
No. 6 Paris Saint-Germain — $578 million
League: Ligue 1 (France)
Location: Paris
2016-2017 record: 27-6-5, 87 points, second place
Sixth-richest NFL team: Houston Texans, $433 million in revenue
No. 5 Manchester City — $583 million
League: Premier League (England)
Location: Manchester
2016-2017 record: 23-9-6, 78 points, third place
Fifth-richest NFL team: San Francisco 49ers, $458 million in revenue
No. 4 Bayern Munich — $657 million
League: Bundesliga (Germany)
Location: Munich
2016-2017 record: 25-7-2, 82 points, first place
Fourth-richest NFL team: New York Giants, $477 million in revenue
No. 3 Barcelona — $688 million
League: La Liga (Spain)
Location: Barcelona
2016-2017 record: 28-6-4, 90 points, second place
Third-richest NFL team: Washington Redskins, $482 million in revenue
No. 2 Real Madrid — $688 million
League: La Liga (Spain)
Location: Madrid
2016-2017 record: 29-6-3, 93 points, first place
Second-richest NFL team: New England Patriots, $575 million in revenue
No. 1 Manchester United — $765 million
League: Premier League (England)
Location: Manchester
2016-2017 record: 18-15-5, 69 points, sixth place
The richest NFL team: Dallas Cowboys, $840 million in revenue