It was the 40th edition of the Stuttgart Open , and part of the ATP World Tour 250 series of the 2017 ATP World Tour .
The 2017 MercedesCup was a men 's tennis tournament played on outdoor grass courts .
MercedesCup was the 40th MercedesCup of the MercedesCup   , and part of the ATP World Tour 250 series of the 2017 ATP World Tour .
The 2017 MercedesCup was a men 's tennis tournament played on outdoor grass courts .