A week after suffering the heaviest defeat of her career, Serena Williams has admitted she is struggling with “postpartum emotions” and has felt in a “funk”, CNN reports.

In a post on her Instagram page, the 23-time grand slam champion revealed her struggles during a period that’s seen her lose 6-1 6-0 to Johanna Konta at the Silicon Valley Classic and withdraw from this week’s Rogers Cup in Toronto.

“Last week was not easy for me,” said Williams. “Not only was I accepting some tough personal stuff, but I just was in a funk. Mostly, I felt like I was not a good mum,

Week after suffering the heaviest defeat of her career, Serena Williams has admitted she is struggling with “postpartum emotions” and has felt in a “funk”, CNN reports.