TENNIS NEWS - The 23-time Grand Slam singles champion will return to the WTA Tour at Indian Wells in California this week.
In an interview with BBC Sport, the 36-year-old American said she is motivated by the thought of playing long enough for her six-month-old daughter to have memories of watching her.
"It's been hard," she said.
"There have been so many days, even still, when I'm like, 'how am I going to keep going?'
"It's been really, really difficult but I keep going and I know that I might not be at my best yet, but I'm getting there and every day is a new day and every day I should be getting better.
"As long as I'm moving forward, even if it's at a turtle's pace, then I'm OK with that."
