text: [{"text_idx": "#000006", "text": "The 20-year-old top seed from Spain was leading 6-2, 3-2 when Koepfer retired, having rolled his ankle at a grimace-inducing angle minutes into the match."}, {"text_idx": "#000008", "text": "Any hope Koepfer had of putting up a fight against Alcaraz evaporated after he stopped short along the baseline in the first game. He took a medical timeout to have his ankle taped and returned to the court with the score at deuce."}, {"text_idx": "#000010", "text": "The German showed grit as he fended off a break point in the third game of the first set but was overheard telling his team that his ankle was in terrible shape. He buried his head in his towel after Alcaraz converted on a breakpoint chance in the seventh game."}, {"text_idx": "#000011", "text": "Down a break in the second set, Koepfer fended off a pair of breakpoint chances in the fifth game before solemnly walking to the net to resign."}]