Manchester United boss Ole Gunnar Solskjaer admits he needs to buy in January if they're to maintain their momentum.
Solskjaer concedes his style of play takes a lot out of his players.
Talking to Norwegian channel TV2, Solskjaer said: "This week might cause people to talk a bit less, and for me it's always more fun to talk about things other than critique or speculations.
"I find it unnecessary when I know what we are doing and trying to do, and what we have planned going forward.
"If we can keep these boys injury-free, we will take lots of points — and we are going to reinforce the squad.
"It is physically tough to play football the way I want to play football. But we are on our way to become as robust as I want and need.
"These boys have the right attitude, they have the belief, they are boys that I want to keep going forward, that's why they are here right now."