Earlier in the day, the third seeded Del Potro, who is suffering from the virus after lost the final of China Open last week, overcame Richard Gasquet of France 7-5, 7-6(7). The 30-year-old Argentine trailed twice but fought from behind to conclude the match with an ace in the tie-break of second set.

In other matches, German world No. 5 Alexander Zverev saw off Nicoloz Basilashvili 7-5, 6-4. Awaiting Zverev in the third round is Alex De Minaur of Australia , who tamed Benoit Paire in straight sets 6-4, 6-3.

Britain's 23-year-old Kyle Edmund also joins the last 16 following a 6-3, 6-4 victory over Italian Andreas Seppi.

Marco Cecchinato, who went through South Korean upcoming young star Hyeon Chung 4-6, 7-6(5), 7-6(5) in the grueling two hours and 34 minutes contest, will face Novak Djokovic on Thursday.

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