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Leeds manager Marco Bielsa has admitted that he sends spies to watch all of his opponents train.

He called a press conference on Wednesday to show journalists why and how he does it.

The Football Association are now looking into whether Bielsa has broken any rules.

Could this be one of the craziest management moments in football? Let's find out...

Newcastle used to be quite a good team in the nineties. In 1996, they were going head-to-head with Manchester United for the title.

Their manager, Kevin Keegan, was doing a post-match interview after tight victory over Leeds took them within three points of Alex Ferguson's Manchester United side with two games in hand.

Little did he know it at the time but his interview would become one of the most iconic moments in Premier League history.

In a message to Ferguson, a visibly angry Keegan said: "You can tell him now, we're still fighting for this title and he's got to go to Middlesbrough and get something - and I'll tell you, honestly, I will LOVE it if we beat them. Love it."

Manchester United went on to win the Premier League title. At one point they had been 12 points behind Newcastle.

Former-Italian international footballer Paolo Di Canio has never been far away from controversy.

In 2012, he was the manager of then League One side Swindon.

With his team losing 2-0 in a game against Preston after 22 minutes, Di Canio made the unusual decision to substitute his goalkeeper, Wes Foderingham.

The keeper wasn't happy. He used offensive language and kicked a water bottle in his manager's direction.

After the game, Di Canio called Foderingham, "the worst professional" he'd even seen.

He also told fans he would give them their season ticket money back and said they should go to watch neighbours Oxford if they were unhappy with his handling of Foderingham.

We could do a whole piece on Mourinho's meltdowns but let's just focus on one... RESPECT.

After losing 3-0 to Tottenham Hotspur in 2018, the then Manchester United manager stormed into the post-match press conference to set the record straight.

A reporter asked Mourinho whether he thought the fans would be happy with a 3-0 loss at home.

Holding up three fingers, Mourinho replied: "3-0, 3-0. Do you know what this is? 3-0. But it also means three Premierships and I won more Premierships alone than the other 19 managers together. So respect man, respect, respect, respect."

He then stormed out without another word.

Alex Ferguson was notorious for using mind games. At the start of 2009, his side Manchester United were seven points behind Rafa Benitez's Liverpool in the Premier League table.

Ferguson complained about the fixture list being favourable to Liverpool and said the Merseyside giants would crumble under pressure. It really annoyed Benitez.

In what should have been a normal press conference, Rafa Benitez, brought a list of 'facts' about Alex Ferguson with him.

He repeatedly used the word 'fact' as he ripped into the Manchester United manager.

However, it didn't have the desired effect. Liverpool faded and Manchester United went on to win the title.

Eric Cantona was one of the best players in the Premier League in the nineties. As well as having all the talent in the world, he also had a bit of a temper.

In 1995, Cantona shocked the world by kung-fu kicking a fan during a game between his Manchester United side and Crystal Palace.

He got in a lot of trouble (as you'd expect) and was initially given a two-week prison sentence.

When this got overturned after an appeal, Cantona's lawyer recommended he do a press conference to explain his actions.

In front of the world's media, Cantona confusingly spoke about seagulls in broken English. No one since has quite managed to work out what he was talking about. See if you can below.