Beautiful hidden detail in Serena Williams' French Open outfit

Serena Williams will be seeking a record 24 Grand Slam titles at Roland Garros and the American has sported her new Nike shoes, with a beautiful detail, ahead of her title charge.

The 39-year-old hasn't had the best preparation for the French Open after she crashed out at the first hurdle in Rome, her first match in nearly three months since her semi-final defeat at the Australian Open.

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But the American was captured on Court Philippe-Chatrier practising ahead of Roland Garros, which she will bid to raise her 24th Grand Slam title and equal Margaret Court's record.

And during her session, Williams sported her new signature Nike shoes.

But fans noticed a few beautiful details etched across the electric lime green sneakers.

One was the phrase: "Never stop fighting," which has been a hallmark of Williams' illustrious career.

However, many fans were also stunned to notice her three-year-old daughter's name, 'Olympia' etched across the shoe.

The signature detail a special reminder for Williams when she has her head down.

Fans lost it over the beautiful reminder.

Williams made $US40 million last year from traditional endorsements, which included Nike, and was only second to Naomi Osaka for female athletes.

Serena Williams' Roland Garros preparation

The 39-year-old, who accepted a wildcard invitation for the Parma tournament after losing her opening match at the Italian Open last week, suffered shock defeat to the 68th-ranked Katerina Siniakova in the second round of the Emilia-Romagna Open.

She had beaten teenage qualifier Lisa Pigato 6-3, 6-2 in the previous round for her first victory since defeating Simona Halep in the Australian Open quarter-finals in February.

After some time off, Williams then lost in straight sets in Rome to Nadia Podoroska.

The 23-time grand slam champ is preparing for the French Open in Paris which starts on May 30.

Meanwhile, Ash Barty has been handed a difficult draw in the French Open as the World No.1.

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