Flexonline.com reported yesterday that Bodybuilder Dave Palumbo of Muscular Development detailing the extent of the injury:

On Wednesday January 16^th, while doing a set of warm-up lunges at his home gym in New Jersey, 2007 Arnold Classic Champ Victor Martinez fell off balance and felt something "give" in his left knee. The pain wasn't intense but it forced him to discontinue his workout.

Today, he went for an MRI at the Hospital for Special Surgery in New York City and it was determined that he'll require surgery to repair the injury. Victor will have one of the top orthopedic surgeons in the country operating on him tomorrow morning; and, if all goes as planned, he should be home by Saturday afternoon.

Victor Martinez was the clear front runner after winning the 2007 Arnold Classic and placing second at the 2007 Mr. Olympia. His official withdrawal from the 2008 Arnold Classic opens the door for other contenders to capture the trophy.