United are expected to be heavy players during the January transfer window.
"I think Ole will try and buy in January. United need another striker and an attacking midfielder, that little wizard number 10," he told 888 Sport.
"The defence is fine. The goalkeepers are fine. The ideal thing would be two strikers and two midfielders. If only it was that easy!"
Turning his attention to the Aston Villa and Leicester stars, he said: "Grealish in the last few games has come on immensely. He can always see the pass.
"Maddison has always been good and he's a threat getting into the box. These are two young English players who would definitely help the squad."