Waters was the big winner at the start, bolting into the lead through Turns 1 and 2 as he left van Gisbergen - who passed Waters early on in race two to secure an earlier victory - scrapping over second with Andre Heimgartner.
It was a scrap that Heimgartner was up for, too, demoting his fellow Kiwi to third on the exit of Turn 2 before covering smartly into Turn 3 to seal second place.
