"It will be hard, with the quality of their players, their fan base and the money that they can spend, but that's the Premier League".
United face competition from AC Milan to re-sign Ibrahimovic, but Mourinho believes the 35-year-old has unfinished business in the Premier League.
Manchester United have spent big this summer, lavishing £140million on Romelu Lukaku, Nemanja Matic and Victor Lindelof.
"Everyone knows that I stopped my worldwide career, so I had a good break".
"This time we're all in the same basket and it's going to be the same for everybody".
What are you scared of that might derail your season?
But to have better positions in the table we need to win more.
Since taking over at Old Trafford the Portuguese has spent nearly £300m and his side is starting to look like a battle-hardened Mourinho unit.
"I just think naturally that a manger in the second season knows the players better, knows the club better".
What are your aims for the season? The diminutive 17-year-old midfielder impressed coach Pep Guardiola with his passing and technical qualities during City's tour to the United States in July and is set to be part of the senior squad for the coming season.
"We bought three and the market is so demanding right now, for all the teams around the world, not just for Manchester City".
Star Bet: Arsene Wenger committed another two years to the Gunners at the start of the summer and his decision to refuse any offers for forward Alexis Sanchez will be key to their hopes of any success this season.
His technique on the ball, being able to use both feet, and the fact that he is a tough-tackler means he can slot into the midfield when the likes of Pogba or Ander Herrera needs a rest.
Hammers boss Slaven Bilic said: "It's not ideal playing there first game of the season, but on the other hand, it is brilliant and one of the greatest away games in the league".
How do you rate Liverpool's chances heading into the season?
"So I don't think he'll be a huge loss to them". While they may have to deal with European commitments once again - all United supporters should sit back and enjoy the side. And while he made no secret of his desire to see one more player come in, the 54-year-old is adamant it will not make or break United's season. But such was the maturity he showed during his first-team opportunities - notably in a 1-1 draw at Manchester United in January - that regular starter Nathaniel Clyne could soon be under pressure for his place.
The football isn't as dreary as it was under David Moyes, and certainly not as boring as it was when Louis van Gaal was in charge.