"I couldn't shake it out of my mind," Williams told Time.
"I have so many things on my mind; I don't have time to be shocked about a loss that clearly wasn't at my best right now," Williams said after her loss to Konta. "When I was out there, was fighting. That's the only thing I can say."
Williams said she found out about Maxfield's parole while checking her Instagram account, ESPN reported.
"It was hard because all I think about is her kids and what they meant to me," Williams told Time. "And how much I love them."
"No matter what, my sister is not coming back for good behavior. It's unfair that she'll never have an opportunity to hug me."
Williams was asked if she could forgive Maxfield but told Time she was "not there yet."
“I would like to practice what I preach, and teach (daughter) Olympia that as well.” Williams told the magazine. “I want to forgive. I have to get there. I'll be there."