Thanks for hitting the hammer on the nail, and Manchester United can not and should never rely on Marcus Rashford for a full season to score 40+ goals in a season. Antonio Martial has been Injured for sometime which have retarded the way he plays and his playing time, Manchester United should also look for a possible solution to him.
Really, they've got plans for the transfer window but who's that player, I'm still very keen to know, no longer sure if Cody Gakpo would make it to Manchester United after recent talks of his countries team mate..
Gakpo would be a solution for many things in the attacking line. He can just increase the activity there very much. Antony's arrival has helped about that actually but they are still dealing with finishing issues as we have talked about it. Gakpo is a player who is capable of increasing the score productivity by a big percentage. Although he is a left winger he has been fascinating with his scoring statistics also. He has had 13 goals and 17 assists in 24 matches already. This is enough to get the attention of bigger teams surely.
On the other hand Real Madrid are also among the rumoured teams to sign him. If they make a serious move for him than Manchester United should just forget about transferring him.

You and many other say think that Gakpo is the best deal for Manchester United, but I disagree because of one reason and the reason is because Gakpo is a winger just like Anthony, Rashford, Sancho, Martial, Garnacho and Elanga. Manchester United has many of his kind, the difference is that he is younger and reigning for now. My opinion is that Manchester United should go for a full fleshed striker like Victor Osimen of Napoli and Manchester United