Vermaelen had been considered a major doubt but has passed a fitness test and replaces Ignasi Miquel at left back, while Oxlade-Chamberlain comes in for Andrei Arshavin.
Tomas Rosicky is also in Arsène Wenger's starting XI, replacing Yossi Benayoun who drops to the bench. However, there is no place in the matchday squad for Thierry Henry, who has a calf injury.
Team in full: Szczesny, Djourou, Mertesacker, Koscielny, Vermaelen, Ramsey, Song, Rosicky, Walcott, Van Persie, Oxlade-Chamberlain.
Subs: Almunia, Park, Squillaci, Arshavin, Benayoun, Miquel, Yennaris.Copyright 2015 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source 22 Jan 2012