Chelsea goalkeeper Petr Cech admits he sometimes questions his sanity playing injured in the past.

Cech played on in Chelsea's 2005-06 Barclays Premier League-winning season despite fracturing both shoulders.

He said: "You always know if someone hits you, it is going to be painful.

"I played 14 months with both shoulders broken and sometimes I'm thinking, 'How did I manage to do that?'.

"But I did because I wanted to be part of the team that won back-to-back titles and I didn't want to rest.

"If you can still do it, and your head is ready to accept the pain, then you can do."