Serena Williams may have just taken on her most worthy opponent: herself.

The 23-time Grand Slam champion used the popular social-media platform Tik Tok to create a video “written, directed, produced, and starring Serena Williams.” It included clips of Williams, sporting different outfits, pretending to play tennis against herself.

Later in the clip, Williams says to herself, “You’re tough.”

“You’re not so bad yourself,” the 38-year-old said.

It made for some lighthearted content with the sports world largely shut down due to coronavirus, including the Wimbledon, which was scrapped for the first time since World War II due to the global coronavirus pandemic.

Williams has also been incredibly candid about her struggles during the nationwide stay-at-home order, revealing in an earlier Tik Tok that she’s been “crazy and stressed” while stuck inside.