All good things eventually come to an end.

After a competitive, three-set match Serena Williams is ready to call it a career after the 40-year-old fell 7-5, 6-7 (4-7), 6-1 to Ajla Tomljanovic in front of an adoring U.S. Open crowd.

“I think, honestly, what I’ll remember most is that my level was coming back,” Williams said. “I think I’m really grateful for that. It’s great to be playing at such a high level, somehow improving. I don’t know how at my age.

Arguably the greatest women’s tennis player of all time, Williams published an article in Vogue last month saying she wanted to expand her family and would be stepping away from the game she has dominated the last twenty years.

Williams, however potentially hinted at a comeback for The Australia Open.

“I don’t know,” Williams said when asked about her retirement, “I’m not thinking about that. I always did love Australia, though.”