Men's tennis matches are the second most intense sport at Duke to attend in my opinion because it is so up close and personal. Especially if you've played or watched tennis for a long time, it's second only to men's basketball for Duke sport I like to watch. If you're looking for an afternoon to kill and be really amped the whole time and wired on your drive home, head over to Cary.
The Duke and Carolina tennis teams don't have the "friendly" rivalry thing that you have with other sports where the players don't take it as seriously as the fans... They hate each other, it's a lot of fun to watch.