Alexis Sanchez joined Manchester United from Arsenal on Monday night and the response on social media from his former teammates spoke volumes.
Armenian midfielder Henrikh Mkhitaryan went in the other direction, 18 months after moving to Manchester from Borussia Dortmund.
Sanchez could make his United debut as soon as Friday night but Mkhitaryan - who is ineligible to play in the Carabao Cup semi-final against Chelsea - must wait until the Gunners visit Swansea City next Tuesday night.
Veteran manager Arsene Wenger is confident that Arsenal's new signing will integrate quickly with his new teammates.
"We lose a world-class player and we gain a world-class player," the 68-year-old said in his Tuesday morning press conference.
"Mkhitaryan has the qualities to integrate into our game and that is based a lot on movement and technical quietly.
"I think he has the attributes, a good team attitude as well and I'm confident that it will work. He can play in all kinds of positions - on the flanks and he can play through the middle as well. I think he's very versatile and it should help us to be very efficient going forward."
Mkhitaryan took part in his first training session on Tuesday - and the Arsenal cameras were on hand to witness his making acquaintances with his new colleagues in north London on Tuesday.
Reaction to Sanchez leaving from Arsenal players
Whilst many of Mkhitaryan's Man United teammates wished him well on his way, there was a stark difference in the reaction from Sanchez's former teammates.
Plenty of Arsenal fans on Twitter had noticed how the whole squad had chosen to ignore the Chilean forward across social media.
German defender Shkodran Mustafi was the only player to pay it any attention, sending a good luck message on his Instagram story.
Theo Walcott and Francis Coquelin both received plenty of tributes upon leaving and Sanchez might feel that he deserved some after three-and-a-half years of service.
Rumours that Sanchez was an unpopular figure in the dressing room look hard to ague with now.
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