Sometimes the challenge of the day is completing the most passes in 7-on-7 drills. Sometimes it's being more accurate on a particular route.
Every day, though, Jon Kitna is challenging Tony Romo to something.
Their competitions are friendly but serious, an attempt to make each other better. The one thing they're not competing for is to be the starting QB of the Cowboys.
Kitna understands that is Romo's job. As the backup, Kitna figures one of his duties is keeping Romo as sharp as possible, which is why he's always finding ways to spice up practice.