The 23-year-old, who came under criticism recently for abandoning the Honda Classic midway through the second round with toothache, has been in a relationship with Wozniacki since 2011.
"Even in my off-season," Golfweek.com quotes Wozniacki as saying. "I'm like, 'Can you just rest for a second? I don't want to see the gym. I don't want to hear about the gym. I don't want to go run. I just want to relax.' He's like, 'No, but let's just go to the gym.' But it's good fun."
Meanwhile, Wozniacki was gifted a place in the Indian Wells semi-final against Angelique Kerber due to an injury suffered by Victoria Azarenka.