Mykhailo Mudryk proved he's moved on very quickly from Arsenal, after sharing video of the Chelsea fans' chant which trolls their rivals about his signing.
Before last week it had looked pretty certain that the Gunners were going to boost their push for the Premier League title by signing Mudryk.
They had been linked with him in the summer and missed out on him, but his social media activity seemed to suggest that it wouldn't be long until he moved to north London.
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Mikel Arteta must have been left at least a little gutted when Chelsea swooped in to snatch him from under their noses, signing him from Shakhtar Donetsk.
On Saturday, Blues' fans took the opportunity to rub salt into their rivals wounds by debuting their new song for him, and no it's not just chanting the name of their club over and over and over and over again, as you can see in the video below.
The song goes, "He flew in from Ukraine, on Boehlys Private plane, Mudryk said to me, 'Have Arsenal ever won the Champions League?'
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"So I told him no, you know the place to go.
"Then he said to me, I wanna lift number three."
Whilst before the move to Chelsea his social media had been awash with hints that he was heading to the Emirates Stadium, he's clearly over that whole episode.
The Ukrainian took to his Instagram page to share the song on his story, along with lots of blue hearts and a smiley face, to prove his heart now belongs at Stamford Bridge.
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It's not the first time that Chelsea have tried to mock their local rivals over a signing recently, following their loan capture of Joao Felix earlier this month.
Arsenal were also linked with the Atletico Madrid forward and Chelsea fans attempted to troll them with a song about the Portugal star on his debut, only for him to be sent off minutes later.
Mudryk's debut on Saturday, against Liverpool, went rather better, even if he was unable to have a decisive say on the outcome of the game.
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It was a rather dull affair for much of the match between the two sides who are surprisingly mid table but the arrival of Chelsea's latest signing, for now, was the catalyst for some excitement.
He came on in the 55th minute and instantly his pace was an issue for the Reds, with James Milner, playing at right back, getting booked for taking him out.
It hurried the arrival of Trent Alexander-Arnold off the bench, in order to counteract the threat that the 22-year-old posed on the left side.
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Certainly Gary Neville was impressed with what he saw of the young forward, commenting that he wouldn't have liked to have faced the Chelsea star.
Arsenal fans can at least take solace from looking at the Premier League table, especially if they beat Manchester United on Sunday.
Topics: Mykhailo Mudryk, Chelsea, Arsenal, Premier League, Liverpool