Arsenal are set to host Bayer Leverkusen and Olympique Lyonnais in the Emirates Cup, and this will bring back some fond memories of the tournament. The Emirates Cup has been an Arsenal tradition since 2007, and despite a change in formats over the years, it has been an exciting way to finish pre-season and welcome the return of the Premier League each summer. Several high-profile teams and players have visited the Emirates as part of the pre-season tournament, and Granit Xhaka and Ainsley Maitland-Niles will now follow the paths of Thierry Henry, Mathieu Flamini and more in returning to face A…