2018 Casino Admiral Trophy

Country	Player	Rank1	Seed
ESP	Roberto Carballés Baena	78	1
SRB	Laslo Đere	94	2
ITA	Marco Cecchinato	97	3
ESP	Adrián Menéndez Maceiras	112	4
POR	Pedro Sousa	119	5
SVK	Andrej Martin	121	6
ITA	Stefano Travaglia	123	7
ESP	Marcel Granollers	131	8

• ¹ Rankings are as of 19 March 2018.^[1]

The following players received wildcards into the singles main draw:

• Alejandro Davidovich Fokina
• Pedro Martínez
• Jürgen Melzer
• Alexei Popyrin

The following player received entry into the singles main draw as an alternate:

• Enrique López Pérez

The following players received entry from the qualifying draw:

• Pedro Cachin
• Kimmer Coppejans
• Lukáš Rosol
• Marco Trungelliti

The following player received entry as a lucky loser:

• Sumit Nagal

• Stefano Travaglia def. Guido Andreozzi 6–3, 6–3.

• Guido Andreozzi / Ariel Behar def. Martin Kližan / Jozef Kovalík 6–3, 6–4.