"Who knows where I'll pop up?" - Serena Williams remains silent on future following Wimbledon loss

Seven-time champion Serena Williams made her long-anticipated return to the hallowed grounds of Wimbledon on Tuesday, but was unable to battle past France's Harmony Tan in her opening round match.

Williams had not played a competitive singles match since retiring due to injury in the first round at last year's Wimbledon. The American showed her competitive drive and spirit in her first match in almost a year, but eventually fell to Tan, who prevailed in a 7-5 1-6 7-6(7) victory.

"It was definitely a very long battle and fight," Williams said after the 3 hour and 10 minute encounter. "It's definitely better than last year, that's a start.

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"I think physically I did pretty good. ... I feel like in just those key points, winning some of those points, is always something mentally that you have to have, that you kind of need. I did pretty good on maybe one or two of 'em, but obviously not enough.

"Today I gave all I could do, you know, today. Maybe tomorrow I could have gave more. Maybe a week ago I could have gave more. But today was what I could do. At some point you have to be able to be okay with that. And that's all I can do."

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Williams, 40, suffered only her third first-round loss at a Grand Slam event in her legendary career. Her win-loss record at Wimbledon stands at a staggering 98-14. It remains unclear whether this was Williams' final outing at Wimbledon. Asked to sum up her legacy at the tournament, she was succinct, if understated.

"I think I'm pretty solid on the grass," she said. "Maybe not today, but pretty solid out there."

When finally asked if it was the final singles match of her long, illustrious career, Williams said that was a question she "can't answer."

"Who knows where I'll pop up?" she added.