The Gunners have won three of the previous four trophies on offer, with Watford a little over 22 months ago the last team to beat them in the competition.
Arsenal are missing Granit Xhaka for the FA Cup tie against Nottingham Forest due to a groin injury .Sead Kolasinac(ankle), Aaron Ramsey (hamstring), Olivier Giroud (hamstring) and Nacho Monreal (ankle) remain sidelined.
Forest have one FA Cup triumph to their name, coming in 1959, and have failed at the third round stage in five of their previous eight campaigns.
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