Rashford could play both wings and forward. Which means, when Raphinha needs rest (these players play 50+ games a season) then Rashford can play, plus he can join later in the game, like 70th minute or 80th minute to bring in some fresh legs. He could not only help with Raphinha, but also Yamal and Lewandowski all at the same time.
It is quite rare to see Rashford as RW. He would be preferred in Raphinha and Lewandowski's positions the most. Besides he is a player who likes to make many goal attempts. And he is right-footed. It is better to put him on the left wing when he plays as winger.
Atletico Madrid is about to complete another CB signing... Chelsea will make a really good profit in his sale if they convince Atletico Madrid for 40 million euros. They bought him for only 14 million.
He is only 21. Atletico Madrid didn't have a young CB like him. Better to secure their future if he performs nicely.