Buy tickets and join the crowds at a game at Markaziy Stadium-Bukhoro. If there's nothing scheduled while you're in town, you might like to check if they give a tour of the grounds.
When you've spent some time at this Bukhara sporting facility, why not make your way to The Ark, Lyab-i-Hauz, and Kalyan Mosque? They're not too far from Markaziy Stadium-Bukhoro and also a hit with many tourists.