Chelsea's Cech: Exciting seeing how Man Utd handle Ronaldo absence
Cech told the London Evening Standard: "They have only bought a few players because Mr Ferguson is happy with what he's got. They have a great squad, but they still have money to get whoever they want.
"It will be exciting to see for everyone whether they will miss Ronaldo more than Ronaldo will miss them.
"Even though Owen has had a few injuries, he has an awesome goal-scoring record. I think he'll be a great addition to their squad.
"Beating them on Sunday will be meaningless if we do not finish ahead of them in the League. We need to win every game."
Cech could have been facing Chelsea if Ferguson had got his way seven years ago.
But Cech insists he has no regrets and added: "It is always nice to hear that one of the best clubs is following you at the age of 19, but in the end I'm very happy with the way it went for me.
"It's a great compliment from a manager who has been in the game for over 20 years, won so many trophies and helped produce so many great players."