Some call her the greatest athlete of all time.

Fresh off making it all the way to the semifinals in February’s Australian Open, Serena Williams seems to have no plans of retiring just yet.

“I don’t think she will stop until she at least wins a Grand Slam,” commented longtime coach Patrick Mouratoglou “She doesn’t quit.”

In Australia, Williams beat opponents from Germany, Serbia, Russia, Belarus, and Romania before losing to Japan’s Naomi Osaka, 6-3, 6-4. Osaka ended up winning the entire tournament, beating American Jennifer Brady in a hotly contested final match.

At present, her grand-slam win total of 23 is just one behind Australian record-setter Margaret Court. Starting in late June, Williams will have a shot at tying that record at Wimbledon.

Regardless of the retirement rumors surrounding Williams, German tennis star Tommy Haus stated that she would leave behind a legacy practically unmatched in modern history. “She would rank with the top athletes of all time, both men and women”. If Williams continues to grace the courts at the globe’s most elite tennis competitions, her status as an athletic legend may be further cemented, growing ever more illustrious and impossible to forget.