After a rough 2-3 mark on the grass, the struggling Alexander Zverev returns to clay this week in Hamburg where he should have plenty of crowd support.
The second-seeded German star will be joined by top seed Dominic Thiem, No. 3 Fabio Fognini and defending champion Nikolaz Basilashvili.
Thiem, who lost his only match on grass to Sam Querrey at Wimbledon, will take on former Top 20 Pablo Cuevas.
Among the other first round matches to watch: Paire v Chardy, Ruud v Haase and Rublev v Garin.
Projected quarterfinals: Thiem-Garin, Fognini-Struff, Paire-Basilashvili, Djere-Zverev.
Last year, Basilashvili beat Leonardo Mayer for the title.
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