Tickets may have been sold however I doubt it will be full, I imagine a lot of these would have gone to sponsors, as for the Olympics I spent some of Friday evening watching the opening ceremony with a swedish family, sought of bought it all home as to what the games are about.
28k was the most, they showed this figure during the first match. 30k was showed during the second match suggesting 2k more people turned up to watch the second match giving a total of 30k. However I would say about 5k left after the first match leaving 25k. I was also there.