COCO Gauff has passed Serena Williams in a feat as the US tennis star moves on in the Cincinnati Open.

The 21-year-old advanced to the quarterfinals of the Cincinnati Open on Thursday.

Coco Gauff defeated Lucia Bronzetti in the Round of 16 on Thursday afternoon.

She beat the Italian in a two-set match, 6-2 and 6-4.

Gauff will look to win her second Cincinnati Open title in three years as she waits for the winner of Jasmine Paolini and Barbora Krejcikova.

But after Thursday's win, she made history by passing the iconic Serena Williams .

Since the Tier 1/WTA-1000 format was introduced in 1990, Gauff now has the third most quarterfinal appearances in such events with 19 before turning 22.

Williams had 18 before her 22nd birthday.

Gauff is just one back behind Maria Sharapova wi

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