2018 German Open

The 2018 German Open (also known as the 2018 German Tennis Championships) was a men's tennis tournament played on outdoor red clay courts. It was the 112th edition of the German Open Tennis Championships and part of the ATP World Tour 500 series of the 2018 ATP World Tour. It took place at the Am Rothenbaum in Hamburg, Germany, from July 23 through 29, 2018.

Seeds

 * 1 Rankings are as of 16 July 2018.

Other entrants
The following players received wildcards into the main draw:
 * 🇩🇪 Florian Mayer
 * 🇩🇪 Rudolf Molleker
 * 🇳🇴 Casper Ruud

The following player received entry as a special exempt:
 * Henri Laaksonen

The following players received entry from the qualifying draw:
 * Nikoloz Basilashvili
 * 🇸🇰 Jozef Kovalík
 * 🇩🇪 Daniel Masur
 * 🇫🇷 Corentin Moutet

The following player received entry as a lucky loser:
 * 🇧🇷 Thiago Monteiro

Withdrawals

 * Before the tournament
 * 🇷🇸 Filip Krajinović → replaced by Aljaž Bedene
 * 🇫🇷 Lucas Pouille → replaced by Nicolás Jarry
 * 🇮🇹 Andreas Seppi → replaced by 🇧🇷 Thiago Monteiro
 * Stefanos Tsitsipas → replaced by 🇩🇪 Jan-Lennard Struff


 * During the tournament
 * 🇫🇷 Richard Gasquet

Retirements

 * Aljaž Bedene

Seeds

 * 1 Rankings are as of 16 July 2018.

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇦🇹 Jürgen Melzer / 🇦🇹 Dominic Thiem
 * 🇩🇪 Philipp Petzschner / 🇩🇪 Tim Pütz

The following pair received entry from the qualifying draw:
 * 🇸🇰 Martin Kližan / 🇸🇰 Jozef Kovalík

Singles

 * Nikoloz Basilashvili def. 🇦🇷 Leonardo Mayer, 6–4, 0–6, 7–5

Doubles

 * Julio Peralta / 🇦🇷 Horacio Zeballos def. 🇦🇹 Oliver Marach / Mate Pavić, 6–1, 4–6, [10–6]