Coco Gauff, the 15-year-old American rising star of the tennis circuit, went the distance Friday to secure a spot in Round 4 at Wimbledon.

Just days after beating veteran Venus Williams in straight sets, Gauff topped Polonia Hercog in three sets.

Cori "Coco" Gauff celebrates after beating Slovenia's Polona Hercog in a Women's singles match during day five of the Wimbledon Tennis Championships in London, Friday, July 5, 2019. (AP Photo/Ben Curtis) (AP)

Gauff clinched her victory at Centre Court Friday, 3-6, 7-6, 7-5, in a tense matchup. She's poised to play Romanian Simona Halep on Monday.

Although Halep is widely viewed as as a top opponent -- the world's No. 6-ranked women's singles player and champion of the 2018 French Open -- Gauff is no stranger to an upset victory, having notched one against childhood idol Williams.

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If she beats Halep, she will advance to the quarterfinals.