The 2019 MercedesCup was a men's tennis tournament to be played on outdoor grass courts.

It was the 42nd edition of the Stuttgart Open, and part of the ATP Tour 250 series of the 2019 ATP Tour.

It was held at the Tennis Club Weissenhof in Stuttgart, Germany, from 10 June until 16 June 2019.

Unseeded Matteo Berrettini won the singles title.

The following players received wildcards into the main draw: The following player received entry using a protected ranking into the main draw: The following players received entry from the qualifying draw: The following pairs received wildcards into the doubles main draw: The following pair received entry as alternates: