United face Tottenham in two weeks' time.
Speaking to the club's official website, he said: “The first game is two weeks from today so we need to step up the training and get an edge to our game again.
“Everyone knows that we will have to be at our best, have to be focused. We know it's a big game for everyone.
"We had Chelsea when we started the league this season so I'm confident that our players can go into the Tottenham game with that mentality of going there to play a very good game of football."
He added: "The players have kept themselves fit as well, which has been great.
“The weather was fantastic when they got going in small groups and gradually now, as we've got into contact training, you can see a little bit more of the edge but also the camaraderie and team bonding.
"That's vital for me in a team. That's one of the main things, that we are a team and the team goes before anything else."