Fifth-seeded German Alexander Zverev came through a frustrating first-round match against world number 56 John Millman of Australia after dropping two sets at the French Open in Paris today ©Getty Images

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Zverev eventually won after more than four hours of play but smashed his racquet several times ©Getty Images
Zverev eventually won after more than four hours of play but smashed his racquet several times ©Getty Images
Eighth-seeded Argentine Juan Martín del Potro survived a scare to beat Chile's Nicolás Jarry in four sets ©Getty Images
Eighth-seeded Argentine Juan Martín del Potro survived a scare to beat Chile's Nicolás Jarry in four sets ©Getty Images
Jarry took the first set before running out of steam ©Getty Images
Jarry took the first set before running out of steam ©Getty Images
Fabio Fognini overcame Andreas Seppi in an all-Italian first-round clash ©Getty Images
Fabio Fognini overcame Andreas Seppi in an all-Italian first-round clash ©Getty Images
Two-time Australian Open champion Victória Azárenka of Belarus beat former French Open champion Jeļena Ostapenko of Latvia in the women's singles draw ©Getty Images
Two-time Australian Open champion Victória Azárenka of Belarus beat former French Open champion Jeļena Ostapenko of Latvia in the women's singles draw ©Getty Images
There will not be a repeat of Ostapenko's 2017 triumph this year ©Getty Images
There will not be a repeat of Ostapenko's 2017 triumph this year ©Getty Images
Awaiting Azárenka in the second round is world number one Naomi Osaka, who recovered from an opening-set whitewash to defeat Slovakia's Anna Karolína Schmiedlová ©Getty Images
Awaiting Azárenka in the second round is world number one Naomi Osaka, who recovered from an opening-set whitewash to defeat Slovakia's Anna Karolína Schmiedlová ©Getty Images
Eleventh-seeded Belarusian Aryna Sabalenka is also through to round two following a straight-sets victory over Slovakia's Dominika Cibulková ©Getty Images
Eleventh-seeded Belarusian Aryna Sabalenka is also through to round two following a straight-sets victory over Slovakia's Dominika Cibulková ©Getty Images
The match was affected by rain ©Getty Images
The match was affected by rain ©Getty Images