Ruben Amorim has warned Manchester United fans that "a storm will come" despite his positive start as head coach.

Amorim is unbeaten in his three games in charge and led United to their biggest league victory since 2021 with a 4-0 win over Everton on Sunday.

The 39-year-old takes his team to Arsenal on Wednesday and has suggested they will eventually be "found out" while the players continue to get to grips with his methods.

"I would like to say different things, but I have to say it again: the storm will come," Amorim said.

"I don't know if you use that expression, but we are going to have difficult moments and we will be found out in some games. I know that because I know my players and I know football and I follow football. We are in the point in that we are putting simple things in the team, without training.

"So let's focus on each game, on the performance, what we have to improve, trying to win games. And that is the focus. I know it's really hard to be a Manchester United coach and say these things in press conferences.

"We want to win all the time, no matter what, we are going to try to win, but we know that we are in a different point, if you compare to Arsenal."

While Amorim's players are still learning about his tactical system, Amorim is also learning about United.

The Portuguese coach has been in the job for three weeks since replacing Erik ten Hag, and he has admitted the attention and the workload which comes with managing one of the biggest clubs in the world has taken him by surprise.

"A little bit, because you don't know how is life in this kind of club," he said.

"So it's always a surprise. I think I can manage that, but you have to do so much more than coach the team. You improve and other things in yourself as a coach, you have to manage the time in a different way.

"You have less time to prepare for the games, not just because you are playing after two days, but also because you have a lot to do. I can say I was a little bit surprised, but at the same time I was expecting something different."