Globalization is on the minds of the men that run the NFL and the English Premier League as they seek to expand their brands.
Mike Ehrmann/Getty Images
Which sport will rule the world? —
NFL fans gather outside London's Wembley Stadium for the International Series game between Detroit Lions and Atlanta Falcons in October 2014.
Getty Images
Which sport will rule the world? —
This has been the most successful International Series yet, selling out Wembley three times. Three further games will be hosted in the British capital in 2015.
Getty Images
Which sport will rule the world? —
NFL chiefs and the British government are now keen to place a permanent franchise in London.
Which sport will rule the world? —
Soccer's English Premier League is also seeking to sell its product abroad, spurred by recent successes such as an exhibition match between Manchester United and Real Madrid in Michigan that drew a record attendance of 109,318.
Getty Images
Which sport will rule the world? —
Premier League chief executive Richard Scudamore says it's a case of when competitive league games are played abroad, rather than if.
Getty Images
NFL vs. football: Who will rule the world? —
Roma's American president James Pallotta is also open to the idea of Serie A games being played abroad.
Gabriel Bouys/AFP/Getty Images
Which sport will rule the world? —
But supporters will fiercely oppose the move, with a growing movement towards fan representation at clubs. At Portsmouth, a fourth-tier English team, a fan consortium saved the club from bankruptcy and now runs the club.
Getty Images
Which sport will rule the world? —
Anger with owners and governance is growing, such as at Leeds United, one of 36 clubs to enter administration since 1992.
Getty Images
Which sport will rule the world? —
English fans are looking to Germany for inspiration, where clubs such as Borussia Dortmund have majority fan ownership and a major influence in club decisions.