The 2018 The Hague Open was a professional tennis tournament played on clay courts. It was the 26th edition of the tournament and was part of the 2018 ATP Challenger Tour. It took place in Scheveningen, Netherlands between 16 and 22 July 2018.
Singles main-draw entrants
Seeds
1 Rankings are as of 2 July 2018.
Other entrants
The following players received wildcards into the singles main draw: Thiemo de Bakker Jelle Sels Botic van de Zandschulp Tim van Rijthoven
The following players received entry from the qualifying draw: Elliot Benchetrit Gijs Brouwer Kimmer Coppejans Alejandro Davidovich Fokina
The following players received entry as lucky losers: Jeremy Jahn Marvin Netuschil
Champions
Singles
Thiemo de Bakker def. Yannick Maden 6–2, 6–1.
Doubles
Ruben Gonzales / Nathaniel Lammons def. Luis David Martínez / Gonçalo Oliveira 6–3, 6–7(8–10), [10–5].