Former Sunderland and Hearts goalkeeper Craig Gordon may be forced to retire from professional football due to a persistent knee injury.
Gordon, 30, became the most expensive goalkeeper in British football when Sunderland paid Hearts £9m for his services back in 2007.
But two broken arms and a knee problem hampered his latter years in the Premier League and he has been without a club this season, which is why Gordon is currently at Dumbarton in a coaching capacity.
The Scotland international said: "It's very unlikely I will be playing again this season. In fact I'm not sure if I'll play again, so I'm looking to get into coaching as I want to remain in the game.
"I'm not ruling out playing again, but I need to get things in place if the news is not good in that respect. I've had a couple of surgeries on it, but it's definitely not back to 100 per cent yet.
"Hopefully I can get back to playing with a bit of pain. It's about getting to a stage where I can get what I need to out of the knee.
"That's part of the reason I wanted to go into coaching, you don't know when the end might come for playing. I'm certainly not ready to throw in the towel just yet but it's been a long time and I don't know where I'll be going in the future."
Gordon was linked with a move to high-flying Everton as recently as November 2012, but a switch failed to materialise.
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