Purchase a ticket and join the fans at a game at Karditsa Stadium. If there's nothing scheduled while you're in the area, you might like to check if there's a guided tour of the grounds.
If you're staying a while in Karditsa, Karditsa Stadium is a good place to kick off your sightseeing. This sporting facility is one of many attractions that'll keep you occupied here. Lake Plastira, Pafsilipo Park, and Castle Panigirakis are also waiting to be explored close by.