One Arsenal star was unable to produce his best against Manchester United as he delivered a performance that ought to impact Mikel Arteta’s future plans. As a team, Arsenal were far from their best against Manchester United at Old Trafford on Sunday afternoon. Despite their sub-par performance, the Gunners were still able to grind out a vital 1-0 win, which kept their Premier League title dream alive. No matter what happens now, the North London outfit will be in with a shout of being crowned champions come the final day of the season. All eyes will now be on Tottenham Hotspur, as everyone con…