Thomas Partey has promised to give his all for Arsenal after signing a long-term deal this summer.
Partey joined Arsenal on deadline day from Atletico Madrid in a deal worth €50 million.
“It’s a great challenge,” said Partey at his unveiling on Tuesday.
“I want to experience new challenges. I’m ready to give it my all and help this club.
“They [manager Mikel Arteta and technical director Edu] told me about their plans and it was so exciting so I had to accept it. I feel great to be here.”
Partey spent eight years at Atletico Madrid having joined them as a teenager in 2012.
He won the Europa League, Uefa Super Cup, and played in the 2016 Champions League final with Atletico.