However, he is without a club as he recovers from cruciate knee ligament damage sustained during the Europa League quarter-final against Anderlecht in April.
Ibrahimovic was released at the end of the season but has been using United's Carrington AON training complex as he continues his recovery and, according to the Daily Mail, he has begun negotiations with the club over a new deal.
Arsenal's new signing Alexandre Lacazette took just 94 seconds to make his mark with a header from Mohamed Elneny's curling cross to equal the record for the fastest opening goal in a Premier League season.
"It was a little kid in a Manchester United shirt, I have no idea where he comes from, so I think for the kid it is something he will never forget and for me, I repeat when I win they don't mean much, imagine when I lose".
As is always the case, the performance from United in various phases of that game raised a few important questions and offered some clues, if you like - ahead of the new season which starts Sunday at Old Trafford against a West Ham United spearheaded by an all too familiar face.
"I'm happy with the effort the club made and happy the club managed to do 75 per cent of the work before the Premier League starts".
Merkel doesn't speak for US on North Korea
Trump dialed up the rhetoric early Friday, tweeting that the USA military is "locked and loaded, should North Korea act unwisely". Trump was referring to the fact that China helps prop up the Kim Jong Un regime economically by taking in North Korea exports.
Mourinho confirms United in talks over Ibrahimovic return
Manchester United kick off the new Premier League season when they entertain West Ham at Old Trafford on Sunday afternoon. Pitting the latest Premier League winners against the most recent FA Cup winners, the game is always a thrilling watch.
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Speaking in an exclusive interview with ESPN FC, the BT Sport pundit said: "The mentality has got to improve". I have to try to adapt a new system and to anticipate playing with nine or 10 men in the next game.
Nemanja Matic is confident that Romelu Lukaku will score plenty of goals for Manchester United this season following his strike against Real Madrid. The Portuguese star was crucial to Monaco upstaging Paris Saint-Germain as the Ligue 1 champions and he showcased his talent in a 30-minute cameo off the bench against West Ham in a friendly. That's different to the three other leagues [Portugal, Italy and Spain] I have worked in.
One of the most valuable free agents on the market, Ibrahimovic quickly became the subject of interest for several clubs and was most recently linked with a potential return to former side AC Milan.
Mourinho added: "The challenge is to win more matches than we did, by scoring more or conceding less, I don't know".
"I think they're in a real good position, the squad looks strong and I think how Rashford, Martial and Lukaku play will determine what happens", said former United defender Gary Neville.
We also got a central midfielder and a striker.
"But we have players and if we cannot strengthen the team in these areas we have people we can trust and go for it".