Todd Boehly and Hansjorg Wyss are part of a group that made an offer to buy the club.
Boehly, who is a part owner of MLB side the Los Angeles Dodgers, tried to purchase the Blues in a 2.2 billion dollar deal in 2019.
Josh Harris, a US billionaire, is considering making a bid.
The Philadelphia 76ers of the NBA and the New Jersey RedDevils of the NHL are among the sports teams that Harris has investments in.
Woody Johnson isn't commenting on reports that he is considering making a bid. The heir to the Johnson & Johnson pharmaceutical company is a billionaire.
The owner of the New York Jets, Johnson was appointed the US ambassador to the UK by Donald Trump.
He bought the franchise in 2000 and they haven't made the playoffs since 2010 and have only one winning season in that time.
People close to the process say that Bayrak's claim that he has made a bid below the asking price should be taken with a pinch of salt.
The west London side was put up for sale earlier this month by the Russian billionaire who has owned them since 2003 and helped them win 19 major trophies.
The threat of sanctions being placed upon Russian business people by the UK government came as a result of the Russian invasion of Ukraine.
The net profits from the sale would be donated to the victims of the war in Ukraine.
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RedBird Capital Partners, the US private equity firm that paid 533 million dollars for an 11 per cent stake in the owners of Reds, is said to be interested in bidding for the club.
The firm would not be allowed to own another club.
The chairman of the Chicago Cubs has also been mentioned. He was part of a group that tried to buy AC Milan.
Nick Candy is a property developer and supporter of the club who is interested in putting together a consortium to buy the club.
Outspoken MMA fighter - and Manchester United supporter - has also claimed to be offering 1.5 billion for the club.
Sky News has reported that the management company of UFC star, Paradigm Sports, have been working with other companies on a bid.
The profile of the owner is not thought to be that of the 33-year-old.
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It doesn't mean that RomanAbramovich is going to get his way unless he has a quick buyer lined up.
Businesses from all over the world are pulling out of Russia because of the sanctions on Russian banks, and it will be hard to do business with the man.
It is difficult to see how much more you can do with the club if you buy it. If you want to continue operating on the Abramovich business model, you will need to spend another billion dollars to build a new stadium and keep bankrolling the playing side.
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People who buy a football club want it to be a project, but it is already a world and European champion. What more can you do to make them better? How much money will you make from them? The investment opportunity was one of the reasons why the club was bought for 300 million dollars. They are hoping that in 10 years, the value of the city will be three billion dollars.
Financial fair play rules mean new owners will not be able to spend big likeAbramovich did in the early days, so that kind of paper return on investment is not possible.
The latest accounts show a loss for the tax year to the end of June, which was the 19th year in a row that Abramovich has put money into the club.