Hamburg Open: Nakashima makes second round

American Brandon Nakashima, the No 7 seed, advanced to the second round of the Hamburg Open when Belgian qualifier Raphael Collignon retired on Monday at Tennis Stadion.

Nakashima, ranked No 29, led 6-5 when Collignon, ranked No 84, pulled out at Tennis Stadion on Monday.

The American will face Italian Luciano Darderi next.

Hamburg ATP 500, other first-round results (Tennis Stadion, clay, EUR 2.158.560, most recent results first):

• Daniel Altmaier vs. Felix Auger-Aliassime
• Alejandro Davidovich Fokina vs. Gael Monfils
• Giovanni Mpetshi Perricard vs. Alexander Bublik
• Yunchaokete Bu vs. Frances Tiafoe
• Sebastian Baez vs. Camilo Ugo Carabelli
• Vitaliy Sachko vs. Flavio Cobolli
• Tomas Martin Etcheverry vs. Francisco Comesana
• Jan-Lennard Struff vs. Justin Engel
• Alexander Zverev vs. Aleksandar Kovacevic
• Borna Gojo vs. Jiri Lehecka
• Elias Ymer vs. Alexandre Muller
• Andrey Rublev vs. Damir Dzumhur: monday
• Marcos Giron vs. Roberto Bautista Agut: monday
• Francisco Cerundolo (4) beat Pedro Martinez Portero: 6-2, 6-3
• Luciano Darderi beat Diego Dedura-Palomero (WC): 6-1, 6-4