The former Anzhi Makhachkala man makes his maiden appearance for the Blues, while the Arsenal striker is fit to feature from the off after initial pre-match fitness fears
The Brazilian makes his first appearance for the Blues opposite last season's Europa League semi-finals opponents, figuring into the attacking midfield trident alongside Eden Hazard and countryman Oscar.
The reigning Swiss champions line up in a 4-4-2 formation, led in attack by captain Marco Streller and Ivorian Giovanni Sio.
In France, Olivier Giroud is passed fit to face Marseille following pre-match doubts, with Mesut Ozil making his first Champions League appearance for the Gunners.
Chelsea starting XI: Cech; Ivanovic, David Luiz, Cahill, Cole; Lampard, Van Ginkel; Hazard, Oscar, Willian; Eto’o.
Subs: Schwarzer, Terry, Azpilicueta, Mikel, De Bruyne, Mata, Ba
Basel starting XI: Sommer; Voser, Schar, Ivanov, Safari; Salah, Diaz, F Frei, Stocker; Sio, Streller
Subs: Vailati, P Degen, Ajeti, Suaro, D Degen, Delgado, Xhaka
Marseille starting XI: Mandanda, Fanni, N'Koulou, Mendes, Morel, Romao, Imbul, Payet, Valbuena, A.Ayew, Gignac
Subs: Samba, Mendy, Cheyrou, Lemina, J.Ayew, Thauvin, Khalifa
Arsenal starting XI: Szczesny; Sagna, Gibbs, Mertesacker, Koscielny; Flamini, Ramsey, Wilshere; Ozil, Walcott, Giroud
Subs: Fabianski, Vermaelen, Monreal, Jenkinson, Miyaichi, Hayden, Akpom