Chelsea goalkeeper Petr Cech says he's a big fan of Manchester City goalkeeper Joe Hart.

Hart has been outstanding on-loan at Birmingham City this season, which face Chelsea tonight.

"He has been doing very well, even when he was at City," Cech told chelseafc.com, "Then the arrival of Shay Given changed things, so for him it was a good new challenge, and the possibility to play regularly which always helps.

"He is one of the reasons why Birmingham are doing so well because he has played well and made important saves at important times. Now the team has a huge self-belief so it is easier to play. But at first they needed to build confidence and he was a part of it.

"Birmingham have many clean sheets and it tells you the story of their season. They have an experienced manager, good organisation and a very good squad with balance. When you have confidence which they will do, everything becomes easier."