Lampard was playing for Chelsea when Mourinho took charge in 2004, with the Portuguese manager masterminding a win over Sir Alex Ferguson’s United in his first game in the hotseat.
The current Chelsea boss was playing in that victory, which kick-started a dominant campaign for The Special One’s side as they won the first of back-to-back Premier League titles under Mourinho.
And Lampard hopes a win over United at Old Trafford on Sunday can do the same for his team’s momentum as it did for Mourinho’s.
The Chelsea legend even reckons his side could be in the title mix if they get off to the right start.
Ex-England star Lampard said: “You would certainly get momentum. I remember the game, it wasn’t great and we didn’t play particularly well, but we won 1-0. It was a nice start for us because we’d had a good pre-season and all our standards had been lifted by Jose Mourinho.
“It would be great to have that sort of momentum after the first game.
“It’s the same because it’s the same teams we’re talking about, but it’s not the end of the story. We’re going to a tough place in Old Trafford, you can lose at those places. We have to have a bigger picture than that.
“But, yes, if we get early momentum by getting a result, it would certainly help – as it helped us in the Jose Mourinho days.
“I hope it would give us a boost and belief but you also get belief through how you train every day.”
After an encouraging pre-season since taking over as Chelsea boss, it’s about to get real for Lampard – the club’s all-time scorer with 211 goals between 2001 and 2014.
Following today’s clash against a United side who will hope to be resurgent following last season’s disappointment, Chelsea face a tough Super Cup showdown against European champions Liverpool in Istanbul on Wednesday.
And the 41-year-old said: “We come back from Manchester and on Monday we fly to Istanbul for Liverpool, so there’s not much time to overthink things.
“We want to hit the ground running but we’ve been given a tough start, especially when you consider the turnaround of Sunday to Wednesday with the travel.
“It will be two hard games. But we have to be up for that.”
Maurizio Sarri’s Chelsea finished 33 points behind Premier League champions Manchester City last season.
But Lampard won’t let that rule his side of this season’s title race: “It makes it sweeter to prove people wrong.”