Alexander Blockx profile: the Belgian's junior Grand Slam title, his 2026 breakthrough in Madrid and Estoril, his playing style, and his Grand Slam record.
Alexander Blockx beat Francisco Cerundolo 6-3, 4-6, 7-5, 7-5 through rib pain that nearly ended his match, becoming the first Belgian man in the US Open quarterfinals.
Learner Tien survived 0-40 in the deciding set and beat Jakub Mensik in five, becoming the youngest American man in the US Open fourth round since Andy Roddick in 2002.
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