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Serena Williams' shock detail in US Open outfit sends tennis world berserk

Serena Williams (pictured left) walking out onto Arthur Ashe Stadium at the US Open and (pictured right) Olympia Williams taking a photo of her mum.
Serena Williams (pictured left) entered Arthur Ashe Stadium at the US Open in her final grand slam tournament with a matching figure-skating dress with daughter Olympia. (Images: Getty Images/Twitter)

Serena Williams and her daughter have left the tennis world stunned after sporting a matching dazzling outfit in her final grand slam tournament of her the American's sparkling career.

Williams was simply introduced as the 'greatest of all time' during her walkout to face Danka Kovinic on Arthur Ashe Stadium in front of a raucous home crowd.

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Having announced the US Open would be her last tournament in a glittering career spanning more than 20 years, all eyes were on Williams on the first night in New York.

And living up to her billing as tennis royalty, Williams stunned the tennis world walking out onto court in an all-black outfit covered in diamonds.

Adding to the mystique, Williams' daughter Olympia was also seen in the crowd wearing a matching outfit and taking a photo of her mother.

The Nike outfit was designed by Williams and modelled after a figure-skater's dress.

The dress has six layers, to replicate her six US Open titles, and her shoes have a diamond encrusted Nike swoosh.

The tennis world was quick to lose their mind over the stunning outfit.

Many compared the sparking outfit to Williams' glittering career and said it was fitting the 23-time grand slam champ would go out shining in her final grand slam tournament.

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Williams entered the matcha against Kovinic with a deafening roar from the crowd.

Before the match, American Coco Gauff shared just how important Williams' influence has been on young athletes such as herself.

"Before Serena came along, there was not really an icon of the sport that looked like me.

Serena Williams (pictured) celebrates a point against Danka Kovinic at the US Open.
Serena Williams (pictured) in her figure-skating inspired dress at the US Open. (Photo by Elsa/Getty Images) (Elsa via Getty Images)

"So growing up, I never thought that I was different because the No. 1 player in the world was somebody who looked like me.

"I think that's the biggest thing that I can take from what I've learned from Serena."

The 40-year-old won her 23rd major at the Australian Open in 2017, and looked all-but certain to eventually equal and pass Margaret Court's haul of 24.

But the American champion hasn't won a grand slam since, losing in four finals during that time.

Williams also owns 14 women's grand slam doubles titles with older sister Venus and has won four Olympic gold medals - one in singles (2012) and three in doubles (2000, 2008, 2012).

with AAP

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