Kevin Keegan claimed that the Premier League is in danger of becoming boring as Manchester United, Chelsea, Arsenal and Liverpool continue to dominate year after year.
Harry Redknapp: "You would need £150million to spend to have any chance of breaking into that top four.
"Look at Liverpool last summer, they spent £28million on Fernando Torres and he is a fantastic player but who else can compete with that?
"I agree with Kevin Keegan, I do not see any way that anyone else can break into the top four.
"Tottenham came closest for a few seasons but if you look at them now they have fallen back into mid-table. Nothing is guaranteed by spending money and it is getting harder and harder to get there.
"I can see more and more foreign investment coming into the Premier League because everybody wants to be associated with it.
"I can see American and Russian billionaires coming in but the trouble is they all want to be winners and only one can win the title. Billionaires do not accept being losers.
"If someone had put £200million into Derby this season then they could have been a successful side and that is the sort of money that will happen in the Premier League."