He again started conservatively to be sixth after the 100m before working his way to third at the 350m mark. Stanley pushed into second but could not pip Klueh, finishing second in 3:42.21.
Snyders, who has four wins to his credit in the series, had to settle for third in the 50m breaststroke, won by Olympic medallist Christian Sprenger (Australia). It was a superb battle with Sprenger, Japan's Yuuki Okajima and Snyders, with 25/100ths of a second separating the trip, which sets up for a superb battle in the 100m on the second day.
In other racing North Shore's Mitchell Donaldson was 15th in heats of the 400m individual medley and Taranaki's Dylan Dunlop-Barrett 26th in heats of the 400m freestyle in 3:57.13.
Day 1 results:
50m breaststroke: Christian Sprenger (AUS) 26.62, 1; Yuuki Okajima (JPN) 26.70, 2; Glenn Snyders (NZL) 26.86, 3.
200m backstroke: Melissa Ingram (NZL) 2:05.39, 1; Marie Kamimura (JPN) 2:05.98, 2; Jenny Mensing (GER) 2:06.95, 3.
400m freestyle: Michael Klueh (USA) 3:40.23, 1; Matthew Stanley (NZL) 3:42.21, 2; Naito Ehara (JPN) 3:43.30, 3.