Even at age 45, Venus Williams displayed some big serves and powerful groundstrokes at the U.S. Open on Monday night.

Venus Williams made an impressive return to tennis this year and managed to make her way to the US Open, but she came up short in the first round.

She underwent surgery for uterine fibroids and a subsequent health issue that was initially misdiagnosed as Sjogren’s syndrome. It resulted in a 16-month layoff, and she just returned last month at the Citi Open in Washington, beating Peyton Stearns and losing her next three, including Monday to Muchova.