Earlier in the day, Alcaraz easily defeated China's Shang Juncheng, winning 6-2, 6-2, while Sinner defeated Taro Daniel of Japan 6-1, 6-4.
Due to a World Anti-Doping Agency (WADA) appeal against a ruling by tennis authorities to exonerate him of any wrongdoing following two positive steroid tests in March, Sinner has stated that he is not in a "comfortable" situation.
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