Interest in Newcastle United appears to have ramped up since Mike Ashley revealed the club was for sale this week - with two parties strongly linked with a bid.
The Echo understands Russian billionaire Mikhail Prokhorov has a keen interest in the Magpies as he monitors the Premier League amid reports he is looking to buy a club.
Prokhorov is the owner of NBA basketball side the Brooklyn Nets, who he bought in December 2015. His estimated worth is £7billion, placing him inside the top 150 richest people on the planet, according to Forbes.
Despite completing the takeover of the US side less than two years ago he is looking to sell and the 52-year-old is keen to dip his toe into the Premier League market.
As yet, though, it is not known if there has been any contact between Newcastle and representatives of the precious metals magnate.
Amanda Staveley, however, has had contact with the club, and appeared at St James's Park a few weeks ago to watch the game against Liverpool.
Here company, PCP Capital Partners, value Newcastle United at around £300million. And, according to news outlet Reuters, they are "interested" in bidding to purchase the Magpies from Mike Ashley.
Further to that, the report claims Staveley's investors believe Newcastle require around £150million of investment in the playing squad over the next two years.
The report, which quotes an anonymous source, reads: "PCP Capital Partners, the investment firm run by British businesswoman Amanda Staveley, is interested in bidding around $400 million (£303.7 million) for Newcastle United.
"PCP, which has not yet put in an offer for Newcastle United, believes the club is worth around 300 million pounds with a further 150 million pounds needed to invest in players over the next two years, according to the source, who spoke on condition of anonymity because the deal is not public."
United was officially put up for sale on Monday evening by St James Holdings, a company owned by Ashley.