Buy a ticket to see a game at Al Nahyan Stadium. If there's nothing happening while you're there, you might like to check if they offer a tour of the grounds.
If you're staying a while in Abu Dhabi City Center, Al Nahyan Stadium is a good place to kick off your exploring. This sporting facility is one of numerous attractions that'll keep you busy here. Abu Dhabi Mall, Marina Mall, and Zayed Sports City Stadium are also ready to be explored nearby.