We spoke to Derek "Diablo" Alvarez, who founded the Miami Casuals and plans to turn hooliganism into a joint US-UK combat sport.
Whether on social media, fan forums or niche online clothing outlets, the look and lifestyle of the football casual still appeals to many people. So why is this decades-old phenomenon still relevant?
Instead of throwing haymakers between dry heaves, modern Russian hooligans eschew intoxication and get on the mat, and it's unsettling.
"When I saw some friends collecting rubbish bins to set on fire, I knew it was going to be a long day."
For a decade, Nick Hay lived the life of a football casual, travelling the Netherlands to watch his team and scrap with opposition fans. Here, Nick explains how he combined his life as a casual with his career.
The footage appears to show an isolated Shanghai Shanhua fan being kicked, punched and pelted with food by a crowd of rival supporters, before finally making his escape.
In an attempt to tackle anti-social behaviour at football games, the Dutch FA plans to introduce a device that registers the identity and location of banned fans on match day.
The Allsvenskan match between Jönköpings Södra and Östersund ended prematurely after a pitch invader assaulted Östersund goalkeeper Aly Keita.
In just three days, the Mediterranean city saw the best and worst of what soccer has to offer.
Fan violence continues in France as Russia and England fans clash again.
Around 60 fans – some armed with knives and baseball bats – brawled at the IWBF Eurocup match.