One former Chelsea star is backing his old club in the Champions League.

Ex-Chelsea star Michael Ballack, who led Bayer Leverkusen to a 2-1 win over the Blues, is adamant Andre Villas-Boas' side can still qualify.

Leverkusen are through to the last 16 and can clinch top spot by beating Genk.

But Ballack said: "Chelsea should believe because they have big players. I am sure they know what they can do."