(L to R) Real Madrid's Sami Khedira, Cristiano Ronaldo, Gareth Bale, Daniel Carvajal and Toni Kroos attend a training session ahead of their UEFA Super Cup soccer match against Sevilla at Cardiff City Stadium, Wales, August 11, 2014.
(L to R) Real Madrid's Sami Khedira, Cristiano Ronaldo, Gareth Bale, Daniel Carvajal and Toni Kroos attend a training session ahead of their UEFA Super Cup soccer match against Sevilla at Cardiff City Stadium, Wales, August 11, 2014. REUTERS/Rebecca Naden

Sports is one of the biggest generator of revenue and athletes have are among the top lucrative careers in the world. Here are the top five richest and most valuable sports team.

1 Real Madrid

Value $3.44 billion

Originally founded as Madrid Football Club in 1902, Real Madrid pulled in the most income of all football clubs. Currently, this club has the big names in football such as Cristiano Ronaldo and Sergio Ramos. The club was firmly established in 1950s and has been going strong ever since.

2 Barcelona

Value $3.2 billion

Officially Futbol Club Barcelona, Barcelona has been around since 1899 and it has the largest fan base in the world on all social networks. It is known to be more than a club as it represents its country. In the past decade, FC Barcelona has won six La Liga titles led by Lionel Messi and Neymar, who are also two of the highest-paid players in the sport.

3 Manchester United

Value $2.81 billion

Manchester United is traded on the London Stock Exchange and New York Stock Exchange and is currently the most successful English football club, with the most League titles. The club was founded in 1878 and it is the first team to win the "Treble" in one season - in 1988-1989 season, Manchester United took home the FA Cup, Premier League and the UEFA Champions League.

4 New York Yankees

Value $2.5 billion

The New York Yankees was originally founded in Maryland as the Baltimore Orioles and it is the richest non-soccer sports team in the world. Yankees is one of the most successful professional sports team in the world and the most high-valued US sports franchise that won 27 World Series and 18 division tiles .

5 Dallas Cowboys

Value $2.3 billion

Dallas Cowboys ranks fifth as the most valuable sports team of the world with overall worth of $2.3 billion. The wealthiest of the NFL teams since 2007 has a combined sponsorship and premium seating revenues of $220 million. In 2013, the Dallas Cowboys was deemed the second-highest US sports franchise in terms of value.

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