PAI Capital are continuing to urge West Ham United's owners to sell up.
UK-based group PAI Capital had seen their £400m takeover bid rejected by West Ham majority shareholder David Sullivan.
PAI managing partner Nasib Piriyev claims Sullivan owes it to West Ham's fanbase to sell his controlling stake in the club.
"If Mr Sullivan does not agree to our offer, he has the full right to do so," said Piriyev, a West Ham fan, to the Daily Mail.
"Although I do believe any owner of a brand of West Ham's calibre must also feel a duty to the community and fans.
"Our business model will change the way the club operates. It will become part of a larger set-up which guarantees more sustainable development so we can compete for the top six every season.
"What (Sullivan) can't do is say that we are not serious. We will continue pursuing this opportunity and make our best efforts to get him to agree to our offer."
