Manchester United boss Louis van Gaal says he's reluctant to make major transfer decisions until he's fully assessed his squad.
And he told Sky Sports: "I don't buy players for the sake of it. I buy players to improve my selection.
"First, I must see what I need in all the positions from the system we shall play and, at this moment, I don't know for sure.
"That's why I chose this system, I can play them all. But (Javier) Hernandez can also play in the striker's position, so can (Danny) Welbeck.
"Rooney can play at No 10 and No 9 and he tells me he can also play at No 11 and No 7, but I prefer him at 9 or 10.
"When you look at the quality of your players - you see Rooney, Van Persie, Hernandez, Mata, Welbeck, (Marouane) Fellaini, (Ander) Herrera a lot of players can play this system."
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