Being 43 doesn’t mean tennis legend Venus Williams has run out of steam. In fact, her engines are clearly still running.

On Monday (June 19), the seven-time Grand Slam champion, who was ranked 697, earned her first top-50 win in nearly four years at the Rothesay Classic in Birmingham, U.K., reports Tennis.com. She defeated 48th-ranked Camila Giorgi of Italy 7-6(5), 4-6, 7-6(6), in three hours and 17 minutes.

Following her hard-fought victory, Williams lauded Giorgi for her performance.

“I thought I played so well today, and she also played incredible," Williams said."I'm so surprised she's not No. 1 in the world. There were so many moments where I just thought, 'This match is over,' and she would hit a shot from out of nowhere.”

"She pushed me to be better than what I thought I could be, and it's great for me. I haven't played a lot of matches, and it's great to come through,” Williams added.

Before returning to the WTA last week, Williams was out of action with a severe hamstring injury that she sustained in January, which forced her to withdraw from the Australian Open.

"I haven't played her in so long, and every set has been just like today," Williams said. "She loves this surface and she's dangerous out here. I hit some serves at 120 [m.p.h.] today, and I haven't done that in a couple of years. I was like, 'Oh my God, there it is! I missed you.'

"I got to a great start, and my leg started hurting in the third game. I was like, 'Oh no, not this.' It was really hard to control my emotions, to be honest, but eventually, I just acclimated to what I was going through,” she continued. “I couldn't move as well as I wanted, but I tried to get to every ball that I could."

Williams’ next match is scheduled for Wednesday when she’ll play the winner between Jelena Ostapenko or Linda Noskova who face off on Tuesday (June 20).