The Premier League champions have been linked with a host of central midfielders in recent months, including Barcelona’s Cesc Fàbregas, Everton’s Belgian Marouane Fellaini and PSV Eindhoven youngster Kevin Strootman.
However, Robson believes United’s current options – Michael Carrick, Tom Cleverley and Phil Jones – deserve credit after the Red Devils won the English top-flight crown by a staggering 11 points.
And Robson doesn’t want to see David Moyes spend big money on a new midfield signing unless it will significantly strengthen the Scot’s squad.
“I know the fans keep talking about this dominant midfielder they want but you have to look at the whole picture,” Robson told Manchester Evening News.
“They’ve talked about players like myself, Roy Keane, Paul Ince and Paul Scholes but if you haven’t got a dominant midfield player or you can’t find one you have to look at what you’ve got.
“You look at players like Michael Carrick, Tom Cleverley, Phil Jones, Anderson and you have to ask are they good enough to do the job? Well they were last season. They won the title by 11 points!
“You always look to improve but if that player isn’t there who is better than the players you have got, what is the point in spending a load of money if they are not as good.
“The fans have to acknowledge that sometimes the player you need or want isn’t always around or available to buy.”