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The player's father Oyvind Solskjaer said: "He would have liked to stay on and was hoping for a 100% recovery. But something has happened with his knee which made it impossible for him to continue."
Solskjaer, who will remain at the club as a coach, joined United from Molde for £1.5m in 1996 and the former Norway international has made 366 appearances for United, scoring 126 goals. (BBC Sport)