The FA Cup semi-final listings span all four stands, but are not the only Chelsea match for which Vivid Seats is offering tickets.

It has listings for all six of the Blues’ final Premier League games of the season, with prices between $149 (£110) and $4,372 (£3,231).

And tickets are already available for the FA Cup final, priced at $452 (£334) and $4,912 (£3,630).

In practice, resale sites offering tickets at inflated values contributes to ticket touting and leaves genuine fans at risk of missing out altogether on tickets to some events.

CST contacted the Premier League last month to express concerns about Boehly’s involvement with Vivid Seats, asking the league to consider whether the 52-year-old is in breach of competition rules.

In a letter of response, Premier League chief executive Richard Masters wrote: “Whilst we understand the concerns you have raised, based on the information currently available to us we are satisfied that Mr Boehly’s involvement with Vivid Seats does not implicate a breach of Premier League rules and, as a result, we do not intend to take disciplinary action at this stage.”

But the CST was not satisfied with the response.

“The Premier League has effectively acknowledged that its current rules do not address ownership links to secondary ticketing platforms, meaning this situation sits within a gap in the system,” it said in an open letter to the club following Masters’ explanation.

“While there may be no technical breach, that does not make the situation acceptable.”

Last season, Chelsea ejected 1,393 people from Stamford Bridge for possession of touted tickets, while 2,740 accounts linked to touts were cancelled.

More than 350,000 attempted ticket purchases were blocked by their ticketing system.

If somebody trying to enter Stamford Bridge were found to be in possession of a ticket purchased at inflated value from Vivid Seats, they would in theory be refused entry, despite the ticket being purchased from a site in which the club’s own chairman has a financial interest.

“Chelsea have invested a lot in ticket touting and we’ve worked closely with them on it,” Ross added. “They have been cancelling touts’ memberships and fair play to them, they’re taking it seriously.

“But it undermines all that when people are still touting their tickets through a service linked to the chairman.”