Ralf Rangnick has revealed three conditions potential transfer targets need to meet before securing a move to Manchester United during the January transfer window.
Rangnick, who was appointed as interim boss until the end of the season, is unbeaten in his first three games in charge, and while he has largely kept his starting XI the same, the Red Devils' boss is looking to add reinforcement during January.
"I've got to know them better in this week, I saw most of them play in the two games and had three, four or five training sessions this week," Rangnick said prior to Saturday's 1-0 win over Norwich City.
"But it's still too early to speak about what might happen in the winter transfer window. If I look at the number of players we have, it's still a big squad, we definitely do not have not enough players."
A number of players could be on their way of the club, with Anthony Martial's agent confirming last week that his client would like to leave, while Paul Pogba is set to become a free agent at the end of the current campaign. Juan Mata and Jesse Lingard also have their contracts expiring in the summer.
"My opinion on winter transfers is clear," he continued. "It needs to be a player who improves the quality, who helps the team to get better. It needs to be a high quality player, no matter which area of the pitch.
"On the other hand, it needs to be a player who, if they were available in the summer, they're available for similar conditions in the winter. Then it might make sense.
"It needs to be the right mentality as well as the right quality. For this competitive league, we need the best possible mentality. He needs to be mature enough, have a winning mentality, and for me the mentality in this league is even more crucial than in any other league in Europe."