Corey Main's disappointing display in the 100m backstroke semifinal capped a mixed day one for New Zealand in the pool.
Main, New Zealand's best medal hope other than para-star Sophie Pascoe, qualified fourth fastest for the semifinals, only to regress and scrape into the finals in seventh place, 1.87 seconds behind Australian favourite Mitch Larkin.
After setting a definitive goal of breaking through to claim his first Commonwealth Games medal, Florida-based Main knows he must improve to achieve that long-held goal on Friday.
"I definitely would have liked to have gone faster," Main said after his semi. "I've got a few things to work on. I need to get better at my speed and holding it over the first 50m."
On a brighter note, New Zealand has two outside medal chances in Friday's 50m butterfly final after Sam Perry and Dan Hunter stepped up to go under 24 seconds and both notch personal bests.