USC senior point guard Jio Fontan suffered a left knee injury during the second quarter of the Trojans' eventual 81-70 loss to Mogi das Cruzes in Sao Paulo, Brazil, on Tuesday. X-rays on the knee were negative, a team spokesperson said, but Fontan will undergo an MRI exam Wednesday. As of now, it's being called a sprain. "I'm always worried about any injury," coach Kevin O'Neill said by phone from Sao Paulo late Tuesday. "But we won't know anything until tomorrow." USC was up by six at the time Fontan went out of the game, but the Trojans quickly fell behind without their captain and senior leader. Forward Aaron Fuller also missed the game with an illness, so USC was forced to play walk-on Eric Strangis extensive minutes and work newcomers Greg Allen, Alexis Moore and Byron Wesley into the rotation. O'Neill said they were in a "little over their heads." Read more: http://espn.go.com/los-angeles/ncb/story/_/id/6869590/jio-fontan-injures-left-knee-usc-loss-brazil