Holly Holm done for '18 after undergoing knee surgery

Holly Holm won't fight again in 2018 after she underwent knee surgery Wednesday for a meniscus injury, her agent said, according to ESPN's Ariel Helwani.

Her agent, Lenny Fresquez, said the former UFC women's bantamweight champion is aiming to be back in action in early 2019.

Holm last fought in June, defeating Megan Anderson via unanimous decision at UFC 225. She had lost four of her previous five matches prior to the victory over Anderson.