Manchester United boss Ole Gunnar Solskjaer says they must not compromise in the transfer market.
United's only signings so far have been £50million Aaron Wan Bissaka and £15million Daniel James.
Solskjaer said: “I'm very happy with the two players we've brought in, but now we've got to be patient.
“This is a long haul and it is very important we get the right ones in.
“We can't just jump onto a different path if we hit a hurdle. My feelings are that I am not frustrated at all.
“I believe in these players. I'm sure we could do well but it's both short-term and long-term.
“We're working on something we've identified that cold improve us, but we've played well, performed well, had some good results so far.
“But it's not about winning games in pre-season. It's about finding a way we want to play to get to the starting line and the team to be gelling."