"I think some athletes will certainly be very disappointed, but athletes are motivated by things much more significant."
Most would be focusing on Olympic qualification, she said.
In February, Carter appeared in a short video alongside a host of other high-profile Kiwis encouraging New Zealanders to vote for change. McCaw also made his strong feelings known, including in a social media post. The rugby heroes were subjected to online abuse from some who backed the status quo.
Rally driver Hayden Paddon was also in favour of change, saying there was often confusion between Australia and New Zealand's flags.
"A new flag would give our country a clear identity."
Former world champion cyclist Alison Shanks was "really disappointed". "Travelling around the world, you see what really represents New Zealand, and it really is that silver fern."
The vote was 56.6 per cent to 43.2 per cent for the current national flag in the referendum.