David Moyes has admitted to the "fear" he holds after becoming the new manager of Manchester United.
Moyes replaced Sir Alex Ferguson at Old Trafford this summer after his fellow Scot had spent 26-and-a-half years at the helm, winning numerous honours with the Red Devils.
And the former Everton boss is braced for the challenge that awaits, as he continues to work with his new squad during their pre-season tour ahead of the 2013-14 season.
"There has to be an element of fear that comes with managing a club like Manchester United," he told a number of British newspapers. "It keeps you working, it keeps you focused and helps you try not to take your eye off the ball.
"Someone said, 'You'll do it easy'. I'm not saying who it was but I don't take that as a given, because I know it's going to be really hard at Manchester United.
"But in the same breath it is a great one (job) because of what I have available and what Sir Alex has left."
Moyes has previously said he will seek advice from Ferguson if required, but he is determined to make his own mark on the side he inherited.
"It has to be a new era," he said. "My job now is to make my history. "I'm going to follow someone who has made incredible history. I think about Matt Busby's history and then Alex Ferguson's history - they could do a film about it.
"I have to make sure now that my history and my time is something which the fans and people in the future talk about."
Moyes said he has been impressed with the attitude of the players now under his charge. "Sometimes when there is a change - and I heard some of the players saying it - you have to impress the new manager," he added.
"I have got to say I have been incredibly impressed about how the players have gone about their work. There's not been a day when I've had people 'throwing out' [slacking off]. If anything, they're enjoying it and they're asking for more.
"I'm going to drive. And I'm going to demand the best out of players. I'm going to demand that they give me more, or as much as I can get from them."