In a short and snappy statement, Atletico wrote: "La Liga informed Atletico de Madrid at 11.28pm (10.28pm BST) on Monday that Arsenal representatives have paid Thomas Partey’s release clause at the sports association’s headquarters.
"The player has therefore unilaterally terminated his contract with our club, which ran until June 30, 2023."
Atletico Madrid have confirmed Thomas Partey's move to Arsenal (Image: GETTY)
When a departing player leaves a club the statement usually thanks them for their years of service.
But Partey received no parting message despite his five-years of hard graft.
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"We already feel like we know Thomas very well based on the work we have done analysing his performances closely in recent times.
"With his all-round game and positive aggressive style, he will be a brilliant addition to our squad.
Thomas Partey will wear the No 18 shirt for Arsenal (Image: GETTY)
"We’ve made a strong start to the season and we want to continue to build on this with Thomas now part of our club.”
Mikel Arteta added: “We have been watching Thomas for a while, so we’re now delighted to add such a high quality player to our squad.
"He is a dynamic midfielder with great energy. He brings a lot of experience from a top club that has competed at the highest level in La Liga and the Champions League for several years.
"We’re very impressed with his attitude and his approach to the game. He’s an intelligent footballer and we’re looking forward to him integrating into our system and contributing to the progress we’re building at the moment at the club.”
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