When 15-year-old phenom Coco Gauff reached the Round of 16 of Wimbledon in 2019, she raised public expectations to sky-high levels and generated more hype than any American tennis player since the Williams sisters. Although the Delray Beach, Florida native has achieved unequivocal success at just 21 years of age, she has yet to meet that truly elite standard. Gauff has plenty of time to attain such dominance, but it will not happen until she conquers her kryptonite.

The two-time major champion and world No. 2 endured another stinging defeat this summer, falling to No. 9 Jasmine Paolini in the quarterfinals of the Cincinnati Open on Friday night — 2-6, 6-4, 6-3. Despite winning the first set in commanding fashion and looking in decent shape during much of the second, Gauff committed a w

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