As exclusively revealed by Goal, an ankle problem has limited the England international to a place on the substitutes bench, though it allows Tomas Rosicky a starting berth after returning from injury.
|8/1||Juan Mata is 8/1 with Paddy Power to open the scoring against Steaua
Elsewhere, Spain international Mata has been rewarded for excellent displays against Swindon and Tottenham with a return to the Chelsea starting XI, having been asked to adapt to the side's new style by manager Jose Mourinho.
The 25-year-old is joined by compatriot Fernando Torres, who today escaped a ban for scratching Spurs defender Jan Vertonghen, while David Luiz, also briefly out of favour under the Portuguese boss, starts in central defence once again.
Arsenal: Szczesny, Sagna, Mertesacker, Koscielny, Gibbs; Arteta, Flamini; Rosicky, Ozil, Ramsey; Giroud. SUBS: Fabianski, Vermaelen, Monreal, Jenkinson, Wilshere, Bendtner, Gnabry.
Napoli: Reina; Mesto, Albiol, Britos, Zuniga; Inler, Behrami; Callejon, Hamsik, Insigne; Pandev. SUBS: Cabral, Fernandez, Armero, Cannavaro, Dzemaili, Mertens, Zapata.
Steaua Bucharest: Tatarusanu, Szukala, Gardos, Filip, Latovlevici, Georgievski, Tanase, Stanciu, Bourceanu, Popa, Piovaccari. SUBS: Nita, Varela, Prepelita, Cristea, Neagu, Leandro Tatu, Kapetanos
Chelsea: Cech; Ivanovic, D Luiz, Terry, Cole; Ramires, Lampard; Mata, Oscar, Schurrle; Torres. SUBS: Schwarzer, Azpilicueta, Cahill, Mikel, Willian, Ba, Eto’o.