John Fury has doubled down on his payment demand from KSI as he has sent ANOTHER chilling message.

KSI suffered a crushing defeat to Tommy Fury earlier this month as he lost a close decision, with the result being changed following their bout in Manchester.

After the fight, ‘Big’ John called out the YouTuber as he demanded £200,000 following a bet they placed before their clash. Check it out below:

A few days removed from his original call out, John has issued a second demand for the payment, claiming he’ll ‘ruin KSI’s career’ if he doesn’t fork out the six-figure fee.

“He lost. He’s got to man up and pay,” the 59-year-old exclaimed.

“Cause I will not let this go. I’ll hound him to death.”

John added: “There you go mate, pay up. You wanted to bet in the first place. Be a man. You was a sore loser when you got picked on the night.

“But you’re gonna pay this money. I’ll never you leave alone. I will ruin your career. I’m on you like a dog on a rabbit. So don’t worry about that. Pay up.”

Last week, John referenced Jake Paul as he ordered KSI to pay up following their bet.

“This is a quick video for KSI. You owe me £200,000,” he said in a clip posted on social media.

“We had a bet, I want paying. Now don’t be like the other fella, Jake Paul. Be a man and pay your bets. We had a bet live on a podcast, we’ve got all the evidence there, we’ll put it all together.

“You owe me, John Fury, £200,000. I want paying. Thank you very much.”