Arsenal have signed Germany forward Kai Havertz from Chelsea on a five-year deal until 2028 for £65m.
The 24-year-old spent three years at Stamford Bridge after joining from Bayer Leverkusen for £71m.
The fee for Havertz, who scored nine goals for the Blues last season, could rise with add-ons.
Havertz has scored 19 goals in 91 Premier League appearances and hit the winner in the 2021 Champions League final against Manchester City.
He moves across London as Mikel Arteta looks to strengthen his Arsenal side following qualification for the Champions League after a six-year absence.