Sir Alex Ferguson says he's 'worried' about Liverpool because of Jurgen Klopp

Ferguson famously wanted to knock Liverpool off their perch when he arrived

Ferguson is impressed by Klopp's track record in Germany (Getty Images)

Manchester United great Sir Alex Ferguson has revealed he is 'worried' about the impact Jurgen Klopp is having on Liverpool.

The German manager has lost just two of his 12 matches since taking over at Anfield from Brendan Rodgers, winning rave reviews about the way he has turned the team around and for his impressive style of play.

Ferguson had a long rivaly with Liverpool but won 13 Premier League titles to see United overtake the Reds as the most successful English club of all-time, with 20 titles to Liverpool's 18.

The Scot famously stated his biggest challenge upon arriving at Old Trafford in 1986 was to "knock Liverpool right off their f***ing perch".

Liverpool last won the title in the 1989-90 season, before the advent of the Premier League.

"I'm worried about [Klopp] because one thing United don't want is Liverpool to be above us, that's for sure," said Ferguson, speaking at the TechCrunch Disrupt London event.

"He's a fantastic personality, he's got that great confidence in himself.

"I noticed in [Sunday's] game when they lost the second goal he went across to Steve McClaren and was smiling and congratulated him - it was class, that.

"He's got a great personality - his big white teeth are always showing he's enjoying it. I know him quite well from the coaching seminars we have and I got a text from him the other day.

"He's going to make a difference to that club, there's absolutely no doubt about it. He's got the personality, he's got the drive, he's got the knowledge and a great presence about him so I think things are looking up there."

Additional reporting from PA