When Billy King heard Nets center Brook Lopez was going to get an X-ray on his right foot, he couldn't help but think back to last Dec. 21 at Madison Square Garden. "I remember when [athletic trainer] Timmy [Walsh] told me when [Lopez] first fractured it in the Knicks game in the preseason, and he said, 'We'll do X-rays as a precaution.' Then I remember the doctor from the Knicks coming out to tell me it was a break," King, the Nets' general manager, said on a conference call Thursday. But unlike last year, when King was told that Lopez had suffered a stress fracture in the fifth metatarsal of his right foot, the news yesterday was relatively good. The X-rays on Lopez's foot were negative and he was diagnosed with a mild sprain of his right foot, an injury that will keep him out for at least tonight's game against the Magic and tomorrow's game in Miami against the Heat. The injury occurred with just under seven minutes left in the third quarter, when Lopez landed awkwardly after completing a drive to the hoop. But after limping on it while moving up the floor, Lopez stayed in the game until the next stoppage in play, when he told the training staff it was just a sprained ankle. Walsh consulted with the Nets' orthopedist, Dr. Riley Williams III. "When the location of the pain, on top of the foot, was different than where he had it before, [Dr. Williams] suggested we wait, ice, get in here and get X-rayed in Orlando," King said. "At noon he went with Timmy to see the Orlando doctor, and had an X-ray and the X-ray looks identical to the one before the season started.