The 2019 Hamburg Open was a men's tennis tournament played on outdoor red clay courts.

It was the 113th edition of the German Open Tennis Championships and part of the ATP Tour 500 series of the 2019 ATP Tour.

It took place at the Am Rothenbaum in Hamburg, Germany, from 22 July until 28 July 2019.

Fourth-seeded Nikoloz Basilashvili won the singles title.

[1] The following players received wildcards into the main draw: The following player received entry as a special exempt into the main draw: The following players received entry from the qualifying draw: The following player received entry as a lucky loser: The following pairs received wildcards into the doubles main draw: The following pair received entry from the qualifying draw: