Serena Williams admits she was in a "funk" after the heaviest loss of her career, fearing her hectic schedule was not leaving her enough time to care for her 11-month old daughter Alexis Olympia.
The 23-time grand slam champion pulled out of the Rogers Cup in Montreal on Saturday citing "personal issues", days after she was beaten 6-1 6-0 by Johanna Konta in the first round of the Silicon Valley Classic.
Serena Williams seeks to stay positive as she combines tennis with motherhood. Source: AAP
"Last week was not easy for me. Not only was I accepting some tough personal stuff, but I just was in a funk," Williams, 36, said in an Instagram post.
"Mostly, I felt like I was not a good mom.
"I read several articles that said postpartum emotions can last up to 3 years if not dealt with. I like communication best. Talking things through with my mom, my sisters, my friends let me know that my feelings are totally normal.
"It's totally normal to feel like I'm not doing enough for my baby."
The American said feeling overwhelmed was a normal part of being a new mother and encouraged anyone struggling through a rough patch to stay positive.
"We have all been there. I work a lot, I train, and I'm trying to be the best athlete I can be," she said.
"However, that means although I have been with her every day of her life, I'm not around as much as I would like to be.
"Most of you moms deal with the same thing. Whether stay-at-home or working, finding that balance with kids is a true art. You are the true heroes.
"I'm here to say: if you are having a rough day or week - it's ok - I am, too!!! There's always tomm!"