Sead Kolasinac has been named in Arsenal's starting XI for Sunday's Premier League clash against Watford at the Emirates Stadium.
The Bosnia and Herzegovina defender came off injured during the Gunners' midweek 2-0 win over AC Milan in the Europa League but has passed a late fitness test and will line up against the Hornets.
Arsene Wenger has made six changes to his side from the last-16 first-leg win at San Siro as David Ospina, Calum Chambers, Jack Wilshere and Danny Welbeck drop down to the bench.
In come Petr Cech, Ainsley Maitland-Niles, Rob Holding, Mohamed Elneny, Alex Iwobi and Pierre-Emerick Aubameyang, while Laurent Koscielny and Aaron Ramsey are rested and not in the squad.
Javi Gracia, meanwhile, makes one change to the Watford starting XI from their 1-0 win over West Bromwich Albion last time out, as Kiko Femenia replaces Andre Carrillo.
Reserve goalkeeper Daniel Bachmann also replaces Heurelho Gomes on the bench due to personal reasons.
Arsenal: Cech; Maitland-Niles, Holding, Mustafi, Kolasinac; Elneny, Xhaka; Ozil, Iwobi, Mkhitaryan; Aubameyang
Subs: Ospina, Chambers, Willock, Nelson, Wilshere, Nketiah, Welbeck
Watford: Karnezis; Femenia, Prodl, Mariappa, Holebas; Doucoure, Capoue; Janmaat, Pereyra, Richarlison; Deeney
Subs: Bachmann, Britos, Hughes, Carrillo, Sinclair, Gray, Okaka
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Giuseppe Labellarte
