The 2023 Hamburg European Open was a combined men's and women's tennis tournament played on outdoor clay courts.

It was the 117th edition of the event for the men and the 21st edition for the women.

The tournament was classified as an ATP Tour 500 series on the 2023 ATP Tour (called the Hamburg Open) and as a WTA 250 tournament on the 2023 WTA Tour.

The tournament took place at Am Rothenbaum in Hamburg, Germany between 23 and 30 July 2023.

[1][2] The following players received wildcards into the main draw: The following players received entry using a protected ranking: The following players received entry from the qualifying draw: The following players received entry as lucky losers: The following pairs received wildcards into the doubles main draw: The following pair received entry from the qualifying draw: The following pair received entry as lucky losers: The following players received wildcards into the main draw: The following player received entry as a special exempt: The following players received entry from the qualifying draw: The following pairs received wildcards into the doubles main draw: