Former Tottenham captain Ledley King admits his injury woes left him frustrated.

King was forced to retire from football in July after a long-running fitness battle with a series of knee injuries.

"I'll probably always think about what might have happened without the injuries," King told the Daily Mail.

"When my knee started coming up I was 25 or 26 and was starting to feel I had a good understanding of the game and my position and could go from strength to strength.

"I had to deal with the injury and do what I could to keep my career going. I'll look back and realise I gave it everything I could to try to perform but it was difficult."