Seeds

Country	Player	Rank1	Seed
FRA	Lucas Pouille	11	1
BIH	Damir Džumhur	31	2
FRA	Richard Gasquet	34	3
CAN	Denis Shapovalov	45	4
SLO	Aljaž Bedene	58	5
HUN	Márton Fucsovics	59	6
GER	Jan-Lennard Struff	61	7
ITA	Andreas Seppi	62	8

• ¹ Rankings are as of April 16, 2018

Other entrants

The following players received wildcards into the singles main draw:

• Attila Balázs
• Alexander Bublik
• Zsombor Piros

The following players received entry from the qualifying draw:

• Matteo Berrettini
• Hubert Hurkacz
• Lorenzo Sonego
• Jürgen Zopp

The following players received entry as lucky losers:

• Marco Cecchinato
• Yannick Maden

Withdrawals

Before the tournament

• Laslo Đere → replaced by Marco Cecchinato
• Alexandr Dolgopolov → replaced by Denis Istomin
• Filip Krajinović → replaced by John Millman
• Florian Mayer → replaced by Yannick Maden
• Jiří Veselý → replaced by Mikhail Youzhny

Seeds

Country	Player	Country	Player	Rank1	Seed
CRO	Nikola Mektić	AUT	Alexander Peya	61	1
JPN	Ben McLachlan	GER	Jan-Lennard Struff	77	2
BLR	Max Mirnyi	AUT	Philipp Oswald	77	3
NED	Matwé Middelkoop	ARG	Andrés Molteni	80	4

• ¹ Rankings are as of April 16, 2018

Other entrants

The following pairs received wildcards into the doubles main draw:

• Attila Balázs / Márton Fucsovics
• Marius Copil / Florin Mergea

Singles

• Marco Cecchinato def. John Millman, 7–5, 6–4

Doubles

• Dominic Inglot / Franko Škugor def. Matwé Middelkoop / Andrés Molteni, 6–7^(8–10), 6–1, [10–8]