Former Chelsea defender William Gallas believes the Champions League can help Chelsea get back to form.

The Blues take on Borussia Dortmund in Germany on Wednesday and Gallas insists ‘form can change quickly’.

“The Champions League can help Chelsea get back to their level,” Gallas told Genting Casino.

“The problem they have is that they have been playing poorly for a few months, which could be a problem for them in Germany – Dortmund are doing really well at the moment – they have won seven in a row and will have a lot of confidence.

“It will be hard for Chelsea to come away with a positive result, but the Champions League is a different competition, so you never know what can happen.”