Solskjaer played Paul Pogba on the left against Granada on Thursday, with the Frenchman impressing before being substituted at half-time as a precaution.
He told BT Sport: "Solskjaer likes the two sitting players, I don't think there's a need for both of them, they need to get Pogba in a linking role with Bruno, if they do, it frees up another position for a forward player.
"The awareness and cleverness they both have allows each other to link up. United's two cleverest players are Fernandes and Pogba so if you can get them close together, they'll score a lot and provide goals for others too.
"If they have a more dominant centre back, they could have a more attacking midfield.
"A lot of the time, United that attacking, flowing play, I think Pogba could bring that with Fernandes. If you get him in there, it frees up the left for Rashford, there's no way you'd want to play against that.
"Discipline-wise Pogba isn't always there at times but going forward he brings something different."