A battery of tests performed on Tuesday morning confirmed Philadelphia quarterback Donovan McNabb suffered a bruised chest in the Monday night loss at Atlanta, and the availability of the Eagles' star for this week likely will be determined by how he responds in the next few days. Coach Andy Reid said McNabb had undergone an MRI, CT scan and X-rays and that all of the tests indicated the bruised chest. There may be further tests in coming days. The Eagles play San Francisco on Sunday at Lincoln Financial Field. "We knew he was hurting," Reid said of McNabb. "It wasn't nearly as bad last night as it was this morning. Obviously, it tightened up on him. But he felt comfortable playing. He never said a word about it." Reid said that, in cases of chest injuries, the Eagles take "extra precautions" in evaluating the injury and doing follow-up testing. League rules stipulate that the Eagles don't have to officially update McNabb's injury status until Wednesday.