The Danish international, who joined from AC Milan for £3m during the summer, had feared he could be out for anything up to four months after failing to recover from a knock he picked up against Charlton two-and-a-half weeks ago.
But further examination has revealed that the 27-year-old does not need constructive work on his knee-bone, and a simpler procedure, cleaning the knee should suffice. He will undergo this surgery on Monday.