The Gunners academy manager is certain that his compatriot still has the quality to succeed at the Emirates Stadium
Former Arsenal defender Per Mertesacker is sure that "genius" Mesut Ozil can still make an impact at the club, but has pointed out that it is up to him to take his game to another level.
The pair won the World Cup together with Germany in 2014, as well as lifting three FA Cups with the Gunners.
The Arsenal faithful have, at times, criticised Ozil due to his languid style and tendency to struggle in big games, something Mertersacker says he understands, but insists his former team-mate is a top-quality player.