Abou Diaby returned to the Arsenal side for their Barclays Premier League clash with West Brom.
The French midfielder suffered an ankle injury during the win over Bolton earlier this month, but was fit to face the newly-promoted Baggies.
Diaby was one of nine changes to the team that started the Carling Cup win at Tottenham in midweek.
West Brom boss Roberto Di Matteo gave Pablo Ibanez his first Premier League appearance since the opening day in one of two changes from the side that beat Birmingham last weekend.
The Spain international replaced the injured Gabriel Tamas (calf), while James Morrison went straight back into the side after completing a three-game ban.
Arsenal: Almunia, Sagna, Squillaci, Koscielny, Clichy, Song, Diaby, Eboue, Nasri, Arshavin, Chamakh.
Subs: Fabianski, Rosicky, Vela, Denilson, Wilshere, Djourou, Emmanuel-Thomas.
West Brom: Carson, Jara, Pablo, Olsson, Shorey, Mulumbu, Scharner, Brunt, Morrison, Thomas, Odemwingie.
Subs: Myhill, Tchoyi, Reid, Dorrans, Zuiverloon, Fortune, Cox.
Referee: Michael Oliver (Northumberland)