"It sucks that it has happened here, because obviously I want to do well at home, but you can never control it."
Erakovic believed if she had been able to take advantage of her opportunities in the first few matches and get some early momentum, the outcome could have been different. She said once Ostapenko, who peaked at 34 in the world last year, found her rhythm she was difficult to unsettle.
"The first few games were very close, they could have gone either way. There were a couple of deuce-advantage games, but I wasn't able to get the start I wanted," she said.
"I struggled a bit to find my timing, to connect and to move. In a few days I will watch the tape and see what I can do to improve."
Erakovic's tournament is not yet over. She is set to take the court again today in the doubles, pairing up with Britain's Laura Robson.
If Erakovic's Auckland tournament ends early, she is planning to head to Hobart later this week to play in the qualifiers as she seeks more court time ahead of the Australian Open.