The frustration on Kyrie Irving's face was evident as he spoke to the media and then buried his head in his hands. After using the eight-day break to heal his ailing body, Irving looked like his usual self again before limping off the court with yet another injury to his left knee in overtime of the Cleveland Cavaliers' 108-100 loss to the Golden State Warriors on Thursday night in Game 1 of the NBA Finals. ''It's disappointing and frustrating because I felt amazing,'' Irving said.