Manchester United manager Louis van Gaal insists he has not played a major role in Jose Mourinho becoming one of the world's most successful managers.
The Chelsea boss, who worked under Van Gaal at Barcelona, often credits much of his success to the Dutchman and his other mentor Bobby Robson
"He talks about me and Bobby Robson and I appreciate that, but you always do it by yourself," Van Gaal said.
The pair meet at Old Trafford on Sunday when United face Chelsea .
They first crossed paths 17 years ago when the Van Gaal offered Mourinho, then 34, a position on his coaching staff at the Nou Camp.