Seeds • Rankings are as of May 15, 2017.
Other entrants The following players received wildcards into the singles main draw: •
Kei Nishikori •
Janko Tipsarević •
Stan Wawrinka The following player received entry using a protected ranking: •
Tommy Robredo The following players received entry from the qualifying draw: •
Daniel Altmaier •
Roberto Marcora •
Franko Škugor •
Mischa Zverev The following player received entry as a lucky loser: •
Cedrik-Marcel Stebe Withdrawals ;Before the tournament •
Martin Kližan →replaced by
Dušan Lajović •
Lu Yen-hsun →replaced by
Horacio Zeballos •
Adrian Mannarino →replaced by
Stéphane Robert •
Viktor Troicki →replaced by
Cedrik-Marcel Stebe Retirements •
Rogério Dutra Silva •
Janko Tipsarević ==Doubles main draw entrants==