Ballack returns for Chelsea

Chelsea coach Jose Mourinho recalled Germany captain Michael Ballack for his first game since collecting a hamstring injury on international duty earlier this month.

Lassana Diarra continued at right-back with Andriy Shevchenko selected as partner to Didier Drogba in attack in the Champions League knockout round first leg tie.

Porto looked to former Tottenham striker Helder Postiga for the goals which would give them a first leg advantage with one-time Chelsea target Adriano on the substitutes’ bench.