Atletico Madrid have released a bitter statement confirming that Arsenal have triggered Thomas Partey’s £45million release clause.
Diego Simeone is thought to be angry that he was powerless to stop the transfer going through.
Arsenal sent proof of funds to the La Liga headquarters which gave them permission to speak to the Ghana international.
Partey completed a medical in Spain and he will not link up with his new team-mates until after the international break.
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.”
When Arsenal announced the transfer, technical director Edu said: “Thomas has all the right attributes to be a top player for Arsenal.
“He is a leader on and off the pitch and he is exactly the kind of player and person we want at the club.
“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.
“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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