Duo doubtful for Chelsea

Chelsea have fitness doubts over Ricardo Carvalho and Andriy Shevchenko ahead of their Barclays Premiership trip to Arsenal on Sunday.

Portuguese defender Carvalho is struggling with a knee injury he sustained against Bolton last Saturday and Shevchenko needs groin surgery at the end of the season.

Michael Ballack has undergone ankle ligament surgery and is not expected to return this season.

Provisional squad: Cech, Cudicini, Hilario, Geremi, Ferreira, Diarra, Terry, Essien, A Cole, Bridge, Lampard, Makelele, Mikel, Wright-Phillips, Drogba, Kalou, Shevchenko, J Cole, Morais, Robben.