Bill Belichick has faced many difficult challenges in his 23 years as head coach of the Patriots. Devising a defensive game plan to stop Justin Fields is not one of them.

The Bears have the worst passing offense in the NFL. Fields is more dangerous as a runner than a passer. He hangs on to the ball way too long. That's one reason why he has  been sacked once in every five passing attempts. That's how bad it is. 

Chicago needs to run the ball well to have a chance. That doesn't figure to happen. The Patriots are extremely well-coached defensively. They just held Nick Chubb to a season-low 56 yards on the ground and the Browns to more than 100 yards below their rushing average last week. The Bears don't have a runner near the caliber of Chubb. 

The Patriots are likely to get back starting QB Mac Jones along with Damien Harris. The run-oriented Patriots should grind down the Bears, who rank 29th in run defense.