Arsenal have signed Italy midfielder Jorginho from Chelsea in a £12m deal.
The 31-year-old, who joined Chelsea from Napoli in 2018, was in the last six months of his Blues’ contract.
He passed a medical on Tuesday and signed an 18-month contract with the option of a further year.
“Jorginho is a midfield player who has intelligence, deep leadership skills and a huge amount of Premier League and international experience,” said Arsenal boss Mikel Arteta.
“He has won in his career, but still has the hunger and huge willingness to contribute here.
“We are so pleased to sign Jorginho and welcome him and his family to the club.”
Jorginho said he was a “bit surprised” at the move, which he called an “amazing challenge”.
Speaking to the Arsenal website, he said playing for Arteta was a “big influence” in his decision and added: “I know he tried a few times to get me before and it didn’t happen due to other reasons, not because of my wishes.
“I just can’t wait to be on the pitch to be honest. Everything has happened so fast.
“It’s an important shirt. It’s an amazing club, a big one, and I’m really excited and happy to be here.
“I’ll try to just bring positive energy, hard work and my experience to help the team. It’s what I always bring with me.”
The Gunners turned their attentions to Jorginho after having two bids rejected by Brighton for Ecuador midfielder Moises Caicedo.
Brighton said Caicedo was not for sale and he looks to set to remain at the club after the 11pm deadline.
Jorginho becomes Arsenal’s third signing of the January window, the club having previously bought Poland defender Jakub Kiwior from Spezia for 20m euros (£17.6m) and Belgium striker Leandro Trossard, who moved from Brighton for £21m.