"It was really disappointing," Stephens told reporters after the loss. "I have been playing good, practicing good. Everything has been good. Just kind of a disappointing night for me. It just happened. I couldn't fight my way out of it."
Stephens, who has been bothered by a wrist injury and also criticized for some lackluster performances this season, added that she was just going to concentrate on her next event.
"Not really anything I'm going to cry too much over. I'm just going to get back to work," she said.
Stephen reached the fourth round of the Australian Open and the quarterfinals of Indian Wells, losing in the first round of Doha and Dubai in between. She was criticized by TV commentators after both Doha and Miami.
Stephens would not respond to her TV critics, but Wozniacki defended her opponent.
"I think we all have matches like this. I mean, last week I played [Jelena] Jankovic, and I just was out there and trying everything but nothing was going my way," said Wozniacki. "It's not a fun situation when you're on that side of the net. It's tennis. Sometimes it goes that way and you have to step up and keep going forward."