There are a number of clubs that are now renowned for the chaos that reigns on an almost daily basis, but Rayo Vallecano are slowly climbing the ladder to take the title.

The club is in an open war with President Raul Martin Presa, who has underfunded the women’s team at Rayo as well as the youth teams. That goes hand-in-hand with the crumbling Vallecas stadium and regressive service to fans.

The fans lead regular protests, which have even seen captain Oscar Trejo publicly side with the support.

In spite of all that, Rayo have had a remarkably successful two years, winning promotion and then surviving relegation last season. However a large part of that success, manager Andoni Iraola, appears to be clashing with the President now.

According to ABC, Presa has struck a deal with former Atletico Madrid striker Diego Costa. That was agreed some time ago, but the deal has not gone through due to the protests of Iraola.

The Basque manager is frustrated that he was not consulted about Costa before negotiations took place and is now threatening to resign should the Hispano-Brazilian be signed.

If Rayo were to lose Iraola, it would be a potentially fatal blow for their season. His work has built a successful and fluid team at Vallecas – without him, they may struggle to replicate their form from the last campaign.

More must-reads:

TODAY'S BEST
Celtics assistant named candidate for Lakers HC job
Rudy Gobert fined $75,000 for gesture in Game 4
Former Canadiens GM on Blue Jackets' radar
Cubs designate lefty reliever for assignment
Two-time Super Bowl champ signs with AFC contender
Stars center matches Gretzky feat as Dallas pushes Avalanche to brink
Gritty young Thunder take down veteran Mavericks in Game 4
Cubs acquiring veteran reliever from Mariners
Top-five NBA Draft prospect suffers scary non-contact injury
Hurricanes stay alive with third-period outburst vs. Rangers
Jaylen Brown's big three-pointer gives Celtics 3-1 lead over Cavs
Avalanche star placed in player assistance program
Mercury announce devastating injury on eve of WNBA season
Randy Moss' son makes major football announcement
Reds place key outfielder on injured list with broken thumb
Tom Brady's broadcasting debut set for Week 1 of NFL season
Struggling Cubs reliever placed on injured list 
Report: Justin Fields had ‘toxic' relationship with ex-Bears QB
Extension makes Lions QB Jared Goff one of NFL's highest-paid players
Kentucky's Reed Sheppard displays excellent skills at NBA Draft Combine