"So it was like, 'oh man'," she added, laughing.
"I hope to go round by round and at least get to the finals, that'd be awesome."
She said she was "ready" to hit the courts.
"I'm going to play early next week, and I'm excited and I'm ready," she said.
Ms Williams said she had missed out on celebrating Christmas because she was flying.
"I missed a whole day, we missed the 26th, so I don't know where the 26th went, we can't find it," she said.
It is the seven-time Grand slam singles winner's first time playing in New Zealand and she said she was excited to be here and play her first match in almost four months.
The former world number one had taken some time off at the end of 2013 to rest. She has dropped to 47th in the world after battling health issues in recent years.
She told reporters outside Auckland International Airport that her aim for the 2014 season was to be like her sister, the current number one women's tennis player, Serena Williams.
"I feel like I'm coming into the season as fit and healthy as I have in many years, so for me that's exciting," she said.
"I've a positive outlook, and my goal is to be like Serena Williams."
