He expects Ferguson’s departure as Manchester United boss may provide a helping hand to rival clubs.
"It (United) has been a machine which has been working for over 25 years," said the Reds boss. “Sir Alex has really put his identity on the club and that has led to success.
"It will take David time to go in and assess everything but it is a club as stable as any in the world and it is ready-made for him.
"There is no doubt he (Ferguson) will be a big miss there because he has been there so many years and been part of the furniture, making the club what it is today.
"But (how they react to the change) is up to the rest of the clubs. The spending powers of the teams up there will always make it close."