Get tickets and join the fans at a game at MMRDA Grounds. If there's nothing happening while you're in the area, you might like to check if they give a tour of the grounds.
This sporting facility is one of the highlights in Bandra Kurla complex. But it's not the only spot worth visiting in the area. After you've paid the entry fee and had your fun at MMRDA Grounds, have a look at nearby Siddhi Vinayak Temple, Mt. Mary Church and Powai Lake.