Arsenal manager, Mikel Arteta, could be about to add former Manchester United defender, Gabriel Heinze, to his backroom staff, ESPN reports. Apart from overhauling his playing personnel, Arteta has also made several significant appointments within his coaching staff. Set-piece coach Nicolas Jover was brought in from Manchester City, while goalkeeper coach Inaki Cana joined from Brentford. It appears Arteta may be bracing for a potential exit this summer and is looking to bring in Heinze as a replacement. The 45-year-old has had a rather unspectacular coaching career so far in his native Argent…