Sometimes there are shocks in the FA Cup, and sometimes, clubs are just asking for it.The latter certainly applied to Arsenal on Sunday as Nottingham Forest beat them 4-2 at the City Ground to send the reigning champions out of the competition in the third round.A brace from Eric Lichaj and penalties from the excellent Ben Brereton and Keiran Dowell gave the Championship side a historic win over the Gunners, a side that has won three of the last our FA Cups.Arsene Wenger is the most decorated FA Cup manager in the history of the competition, but it could be argued he did not respect the cup or the opposition with the team he selected on Sunday.Per Mertesacker, Mohamed Elneny, Danny Welbeck, Theo Walcott and David Ospina were the only true senior players to start the game and none of them are real starters anymore.Alex Iwobi, Rob Holding and Ainsley Maitland-Niles served as the next most senior players and the rest that featured can be labelled as promising youngsters.Still, Arsenal's average age was higher than Forest's and they had a team that has accumulated more than 600 Premier League appearances - fans will think that should have been enough.One long-suffering and somewhat famous fan is Piers Morgan, and the Good Morning Britain TV presenter hasn't been shy in his assessment of Arsene Wenger in recent years.While it could be said that Morgan is a provocative and combative tweeter from time to time, his reaction to Arsenal's shock exit from the FA Cup has been viewed as spot on by the Gunners' fanbase.

Morgan is right: this is the first time in Wenger's 21 years at the club that Arsenal have exited in the third round of the FA Cup.

On top of that, Forest aren't exactly flying in the Championship; they sit in 14th place and they had only won once in their previous eight games before this cup upset.

Arsenal sit five points off fourth in the Premier League and with Alexis Sanchez and Mesut Ozil almost certain to depart either this month or the summer, Arsenal fans must be dreading another year of Wenger.