Arsenal may recall Granit Xhaka for Saturday's Premier League visit of Southampton.
The former Gunners captain has not featured for the club since swearing at supporters following his substitution against Crystal Palace last month, but could return having played both of Switzerland's internationals last week.
Southampton manager Ralph Hasenhuttl has a full-strength squad after reporting no fresh selection concerns following the international break.
Defender Ryan Bertrand is available having completed his three-match suspension for a red card in the 9-0 defeat by Leicester.
Arsenal provisional squad: Leno, Martinez, Bellerin, Chambers, Mustafi, Holding, Papastathopoulos, Luiz, Kolasinac, Tierney, Guendouzi, Xhaka, Torreira, Willock, Maitland-Niles, Ozil, Pepe, Saka, Nelson, Lacazette, Aubameyang, Martinelli.
Southampton provisional squad: McCarthy, Gunn, Soares, Vestergaard, Stephens, Yoshida, Danso, Bertrand, Bednarek, Romeu, Ward-Prowse, Armstrong, Redmond, Ings, Djenepo, Boufal, Adams, Obafemi.