Despite potential evidence to the contrary Sunday, the Dallas Cowboys are still a tough team to beat. And the Arizona Cardinals plan to treat their Week 3 opponent with their due respect, according to safety Tyrann Mathieu.He said Tuesday on the Rich Eisen Show that while the Cardinals will review tape of the Broncos game, they are still be preparing for a tough, physical game next Monday."I think every team is different, but we're definitely going to look at the Denver game and any other game that pulls a problem for the Cowboys," Mathieu told Eisen.