Acknowledging that the team is "very concerned" about the sprained elbow suffered by Eli Manning on Saturday night, New York Giants coach Tom Coughlin said Sunday that the starting quarterback will require further tests to settle on a definitive opinion about the extent of the injury. Manning awakened Sunday with soreness and pain in the elbow, which was injured in the second quarter of Saturday's preseason game, when the New York quarterback was hit by Carolina Panthers defensive end Julius Peppers as he was about to throw a pass. Manning underwent an MRI on Sunday and, while Coughlin described the injury as a "sprain," he allowed that a full analysis will not be available until Monday, when team physician Dr. Russell Warren examines the elbow. "I'm very concerned," said Coughlin, who spoke to team trainer Ronnie Barnes, but not Manning, about the injury. "Any time you have a quarterback who has soreness in his elbow, there is concern about the injury. It's not like he just woke up and was out there throwing, and you were getting reports that there was nothing to it."