Published: Wednesday 14 March 2007, 1.41CET
There are four ligaments in each knee, two cruciate ones at the front and back and collaterals on each side, with lesions occurring in any them if the knee is over-straightened. Damage to the anterior (front) cruciate ligament is the most serious and although the success rate for surgery is high and the player can soon be walking, it can take five to 12 months before they are back in training and running again.
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Last updated: 17/04/12 18.51CET