Chelsea’s rivals want the Premier League to investigate claims they broke rules to sign central defender Andreas Christensen.

A report emerged last week that, according to documents obtained by Football Leaks, Chelsea employed Christensen’s father, Sten, as a scout on the same day they signed the Denmark international from Brondby in 2012.

Alleged copies of Chelsea’s consultancy agreements, published by Politiken, state that Sten started working for the London club on July 1, 2012, the same day as his son, and was paid £11,400 per month plus VAT for four years – a total of £656,640 – while he was still working for Brondby as a goalkeeping coach.

Payments to the families of young players are prohibited, with Everton and Liverpool both having been fined by the Premier League and banned from signing under-18 players in recent years.

Telegraph Sport understands that more than one Premier League club now want Chelsea to be properly investigated over the accusations that could lead to a ban on signing young players.

The Premier League refused to comment on any specific case, but said: “If we receive any substantiated material that suggests our rules may have been breached, or relevant information has not been disclosed, we will investigate and have a track record of doing so.