(AP Photo/Gus Ruelas)

ARLINGTON, Texas (AP) The Dallas Cowboys received the good news they expected after a preseason knee injury to Zack Martin, the highest-paid guard in the NFL.

Two people with knowledge of the diagnosis said Sunday that Martin has no structural damage in his hyperextended left knee and should be ready for the opener.

Martin was injured in the second quarter of the Cowboys' 21-13 exhibition loss to Cincinnati on Saturday night. The people told The Associated Press that an MRI confirmed the Cowboys' belief that the injury wasn't serious. They spoke on condition of anonymity because there was no official update on Martin's status.

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