Arsenal have beaten Tottenham in the race for William Saliba
The Gunners have been tracking the 18-year-old for several weeks and appeared close to completing a deal earlier this month.
However, a rival bid from north London neighbours Tottenham cast doubt on the youngster's future.
Saliba made his preference known to the Saint-Etienne, though, and he will now seal a switch to the Emirates Stadium after undergoing a medical.
Arsenal will pay £28m to land the centre-back, who will return to Saint-Etienne on loan for the 2019/20 campaign.
The teenager reportedly chose Arsenal because he thinks it will be the best move for his development.