Arsene Wenger has named the two main things Chelsea's new owners must do in order to be successful.
Roman Abramovich confirmed last week in a statement that he would be ending his 19-year association with the club and sell his shares at Stamford Bridge.
The 55-year-old Russian has set a price tag of around £3billion for the club, with numerous interested parties making contact with Abramovich over the last week.
Wenger feels like £3bn is above the going rate for Chelsea, and also offered some advice for prospective new owners if they were to achieve the same sort of success in west London.
Speaking to beIN Sports, the Arsenal legend said: "I would say that he was the first big investor [before] the Glazers to come in, at a golden period for a guy that was a billionaire. There was no Financial Fair Play (FFP), you could put as much money in as you wanted.
"Today, with the FFP, I would not necessarily advise somebody to come in to fight against Manchester City, Chelsea, Liverpool, who are light years ahead of them, to build a good team - because you cannot invest the money you want to invest.
"So it is much more difficult today. But he came in at the golden period and I give him credit.
"He understood quickly what to do, put competent people in charge who managed the club very well and put him to a level that is absolutely outstanding. I have a lot of respect for what he did."
Asked what the new owner(s) would need to do to achieve success, Wenger responded: "It is still sustainable as a football club today because they are at a good level. But after that when you come in it is down to money and good decisions.
"Sometimes people have good decisions but no money, sometimes they have money but they make bad decisions. So you have to put the two together."
Wenger was then asked about the £3bn price tag Abramovich has placed on Chelsea. He said: "I think first you would have to assess what is the real price of the football club?
"I personally think it's 2-2.5 times the turnover. For example, if the turnover for a club per year is £700m, the normal price would be £1.4bn to £2bn, and that looks to make sense.
"After that it looks like today, in the world, you have many buyers and that the price is not 2-2.5 times the turnover, it looks like 4-5 times is requested. Why is that? Because certainly Abramovich said that he has a lot of money in there that needs to be paid back to him.
"Some people say it’s over a billion that he has personally put into the accounts there and loaned to the club, so that will certainly be added to the price. And secondly the Premier League is where everybody wants to be today who has money, so it will be an interesting story."
