The 32-year-old was a free man after leaving Chelsea, having gone through seven years at Stamford Bridge.
Willian had dismissed the proposal of a two-year extension with the Blues, preparing for him to join their London rivals.
Gunner manager Mikel Arteta conceded he was dazzled by Willian’s longing to join the Gunners.
“I accept he’s a player that can truly have any kind of effect for us,” said Arteta.
🆕 New club. New colours. New beginnings.
— Arsenal (@Arsenal) August 14, 2020
“We have been checking him for as far back as hardly any months, we had an unmistakable aim to reinforce in the attacking midfielder and the winger positions; he is a player that gives us a ton of flexibility, he can play in three or four distinct positions.
“He has the experience of everything in the football world however to in any case have the aspiration to come here and add to bring the club where it has a place. I have been truly dazzled with all the discussions I have had with him and the amount he needed to come.”
Chelsea manager Frank Lampard had been clear all season that he needed to keep Willian at Stamford Bridge.
In any case, the previous England midfielder as of late conceded the Blues would need to acknowledge Willian’s choice, regardless of whether that implied him playing for one of their fundamental adversaries next season.
Willian assisted Chelsea to two Premier League titles, one FA Cup win and the 2019 Europa League, where the Blues pounded Arsenal 4-1 in Baku.
The ex-Corinthians player had to watch on when Arsenal beat Chelsea 2-1 in the current year’s FA Cup last be that as it may, passing up a great opportunity through a troublesome lower leg issue.
Willian will wear the number 12 shirt at Arsenal.
“I know him well overall, since quite a while prior in light of the fact that we’ve been cooperating for the Brazilian national team, and obviously I was tailing him since he played for another club,” said Arsenal’s specialized chief Edu.
“He has plenty of awesome characteristics as an individual, as a football player obviously, his character. I’m 100 percent sure that everyone in the changing area, the fans, myself, and Mikel will appreciate having Willian in our side.”