The Red Devils are expected to spend big when the transfer window re-opens, with added firepower towards the top of their wish list.
Collymore, though, believes that United should be looking to land an out-and-out goalscorer such as Argentine star Higuain, with Jose Mourinho in need of a physical presence to replace Zlatan Ibrahimovic.
He told the Daily Mirror: “United’s campaign would have looked a lot sorrier without the goals and influence of Zlatan Ibrahimovic.
“We keep hearing that Jose Mourinho will sign Antoine Griezmann from Atletico Madrid but he’s not the leader of the line that the United boss likes.
“If he is spending in the region of £100 million he should look instead to Juventus and offer them a quick return on the cash they laid out last season on Gonzalo Higuain.
“The Turin giants paid just north of £70 million for the Argentina international 12 months ago.
Higuain has netted 32 times for Juve in all competitions this season, with the 20-goal barrier broken in seven of the last nine campaigns.
Griezmann, meanwhile, has 25 efforts to his name and 82 in just 156 appearances for Atletico.