Former Manchester United midfielder Paul Scholes feels David Moyes used Marouane Fellaini all wrong last season - hence the Belgian's poor form at Old Trafford, according to his regular column in the Independent and London Evening Standard.
Indeed, Scholes says he has always viewed the 27-year-old's best position being that of an 'unorthodox no.10,' a sentiment he shared with Ryan Giggs.
Moyes, however, deployed Fellaini in central midfield, thereby exposing his major weaknesses, according to Scholes.
This season, Fellaini has looked a different player, flourishing for Manchester United as the club return to somewhere nearer the heights they used to scale under Sir Alex Ferguson.
He explained: "When I was coaching under Ryan Giggs at the end of last season, we always felt that Fellaini’s best position was as an unorthodox no.10 - the role he is playing now. When he first joined United, David Moyes had played him as a central midfielder but I don’t think controlling the game from there is Fellaini’s biggest strength."
Under Van Gaal, the former Manchester United midfielder believes Fellaini is, by contrast, being used in his very best position.
The key, for Scholes, is that the 27-year-old isn't being asked to do things he finds difficult at Old Trafford, with the results clear for all to see.
He added: "When I played against him when he was at Everton, he was just a giant nuisance: elbows up, big and strong and always liable to peel off and take up a position at the back post. That is how Van Gaal is playing him now and not asking Fellaini to do the things he finds more difficult."
Manchester United travel to Stamford Bridge to face Chelsea in the Premier League on Saturday evening, against the side they drew 1-1 with at home earlier this season.