Man City midfielder Yaya Toure: Man Utd weaker without Ferguson
Toure is convinced United will still be a force next season.
But he knows Fergie's departure will be a blow for the champions.
He said: "United are a great club and Ferguson is a big character there.
"He has built everything at United and the balance, I hope, will go to the City side now.
"Tottenham are coming through and the Premier League is going to be very, very tough."