Cowboys defensive coordinator Rob Ryan will face the challenge of trying to stop the undefeated Lions and star wide receiver Calvin Johnson this weekend. Ryan says that Johnson is "a great receiver," but not as good as the Cowboys receiving duo of Miles Austin and Dez Bryant. "We work against better receivers with Miles Austin and Dez Bryant. They are probably two of the premier receivers in football, but this guy is right there," Ryan said. "He's almost that good. He's excellent. "We're going to get after him. I know he's on some touchdown thing like that, whatever. [Lions offensive coordinator] Scott Linehan has done this before with great receivers with Randy Moss. If the guy is as good as Randy Moss I'm going to go in there and hide. Thank God he's not, but he's a pretty [expletive] good player."