Goalkeeper Craig Gordon has denied calling time on his career despite an ongoing battle with a knee problem. The former Hearts and Sunderland 'keeper has not signed with any club since his Sunderland contract ended last summer and has recently been coaching at First Division side Dumbarton. Gordon only played one game last season but he has denied rumours he has already retired from football.The Scotland international said: "People can say what they like to say but I'll continue to try and rehabilitate my knee and get myself in the best possible state. If that means I can get back to playing football then I'd be delighted. I've been round people in Europe and back home getting as many opinions as possible to find the one thing that will help."