I just had my first water polo match, we played four periods against Lystrup. For the third and fourth periods I joined the Lystrup team since some of their players had to go early. I played the entire fourth period without substitution, that was rough :). I am now very tired, so I am going to hit the sack. The game went all right, a score was not kept, but I think my club (A.S.S.) did okay.
For an lean introduction to water polo, check this video made by the american water polo association.