David Beckham says he regards Sir Alex Ferguson as the biggest influence on his career.
The former England captain spent 10 years as a professional at Old Trafford before leaving for Real Madrid in 2003.
Beckham, who came through the youth ranks at the club, says he owes plenty of his success to the Scot, who celebrates 25 years as manager at United this weekend.
"The boss deserves almost all the credit [for how my career has turned out]," Beckham said.
"It's 50/50 with my parents – that's how highly I regard the boss. My parents were the ones that brought me up and helped get me to a certain level in my career, and the manager is the one that took me to a whole different level of playing for Manchester United and for England.
"He was the one that gave me my chance as a young kid. He gave me my debut at Brighton [in September 1992] and my Champions League debut against Galatasaray when I played at Old Trafford and scored my first goal for the club.
"He's the sole reason why I was successful at Manchester United and successful in my career.
"You see so many young players fall by the wayside but under the boss that was never going to happen. He looked after us all and gave us everything we needed to become the players and the men that we are today."
Ferguson is the longest serving United manager of all-time as well as the longest currently serving manager in British football, and the 69-year-old's record is unlikely to be broken according to Beckham.
"It [spending 25 years at a club like United] just doesn't happen in football anymore. That loyalty and respect for just one club is unbelievable and it's not something you see these days," explained the midfielder.
"It says a lot about Manchester United as a club and a lot about the manager when you consider how long he's been there, and just look at the success we’ve had over the years.
"It's been amazing. But that's what happens when you have stability and a man that's so passionate and hungry and has the love for one club that he has."