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Jannik Sinner beat American twelfth seed Taylor Fritz in straight sets (6-3, 6-4, 7-5).

World no.10 Alex de Minaur looked comfortable on his return from injury, beating American Marcos Giron in four sets (6-3, 6-4, 5-7, 6-4).

Alexei Popyrin is in the form of his life after winning his first ATP 1000 title in Montreal earlier this month. He will play unseeded Spaniard Pedro Martínez in the second round.

World number one tennis player Jannik Sinner has been cleared of any wrongdoing after he tested positive for a banned substance earlier this year.