The 21-year-old is the Gunners’ first signing of the summer in a deal reportedly worth around £8m. He will join up with his team-mates in north London once he has completed his isolation period.
This signing is an attempt for the Gunners to strengthen their left back position as he will provide support for the club’s current left back Kieran Tierney.
Tavares made his first-team debut in the Portuguese Super Cup win over Sporting Lisbon in August 2019.
Since coming from the Benfica youth system, he has made a total of 25 senior appearances for the club since.