Manchester United chief Omar Berrada was booed by Manchester City fans when his face appeared on the big screen during Saturday's Community Shield clash.
The Moroccan used to work for Pep Guardiola's side but left to join their fiercest rivals earlier this year.
Berrada hasn't had to wait too long to be reunited with his old club, with United and City locking horns in the Community Shield today.
And it's fair to say City fans don't appreciate the 46-year-old's departure, with fans from the club booing him as his face appeared on the big screen.
Omar Berrada was booed by Man City fans during their Community Shield clash with Man Utd
GETTY
Berrada is United's CEO and has recently wiped his social media of all pictures associated with City.
His arrival is just one big change over at Old Trafford, with the Red Devils tinkering with their set-up as they seek to return to the glory days of old.
Jason Wilcox and Dan Ashworth have also joined the United board as technical director and sporting director respectively.
And the Red Devils have brought in Ruud van Nistelrooy and Rene Hake to work as Erik ten Hag's assistants.
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United have overpaid on big names over the years, without little success.
And Berrada, speaking recently at a ceremony in Barcelona, said overpaying for players is unwise.
Marc Guerrero wrote on LinkedIn : "It was a pleasure to meet Manchester United's appointed new CEO, Omar Berrada (one of the most experienced football executives at the top of European football) at the sidelines of EU Business School commencement ceremony.
"Berrada arrives to the United after being chief football operations officer (COO) at Manchester City Football Club.
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"For him, implementing the correct structure at the club is key to the team's success.
"He also warns overpaying clubs, players and agents in the transfer market can lead to teams finding themselves on a 'slippery slope'."
United have already signed two players this summer in the forms of Joshua Zirkzee and Leny Yoro.
And they're on the verge of landing two more, with Matthijs de Ligt and Noussair Mazraoui set to come in from Bayern Munich.
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Omar Berrada was sat next to Sir Dave Brailsford and Dan Ashworth during Man Utd's Community Shield clash with Man City
PA
United boss Ten Hag, meanwhile, has opened up on his decision to leave Zirkzee on the bench.
Fans had been hoping to see the forward start following his move from Bologna.
But Ten Hag has gone with Marcus Rashford, Bruno Fernandes and Amad as his front three instead.
Explaining his decision, the Dutchman said: "There are many games to play. He needs time.
Omar Berrada was once a key cog in the Man City machine before his departure to Man Utd
PA
"Every player at a new club, not only at Manchester United or only when you come to the Premier League, everyone needs time.
"We have to be patient and we have to bring him carefully [into the team] and then he will adjust. I am sure he will contribute a lot."
