Alex de Minaur broke serve five times and won eight of the last nine games beating former No. 1 Rafael Nadal 7-5, 6-1 in Barcelona.
Naomi Osaka fell short in her first match on clay since Roland-Garros 2022.
Fifth-seeded Zheng moved past Sorana Cirstea in straight sets.
Playing his first match in 103 days, Rafael Nadal beat No. 62 Flavio Cobolli 6-2, 6-3, in his Barcelona comeback to raise his career clay-court record to 475-45.
Is Iga Swiatek or Chris Evert the greatest women clay-court champion of all time? A tennis historian explores the case and draws one conclusion.
Stefanos Tsitsipas saved all eight break points he faced sweeping Casper Ruud 6-1, 6-4 to win his third Monte-Carlo Masters crown in the last four years.
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