Mertesacker will hang up his boots next summer, but it has been revealed that he will lead the club’s youth setup ahead of the 2018-19 campaign.
He told the club’s official website: “This is the start of an exciting new chapter for me and I am delighted that I will be able to stay part of the Arsenal family.
“This season I will remain fully focused on my job with the team and am looking forward to a successful last season on the pitch. After that, I look forward to the exciting challenge of helping produce young players good enough to play for the Arsenal first team.”
Last season, the 32-year-old made just two appearances for the Gunners because of injury, but he put in a man-of-the-match display in the FA Cup final as Arsenal edged out London rivals Chelsea .