2017 Città di Caltanissetta

Country	Player	Rank1	Seed
ITA	Paolo Lorenzi	34	1
SRB	Dušan Lajović	81	2
KAZ	Mikhail Kukushkin	85	3
MDA	Radu Albot	88	4
ARG	Facundo Bagnis	101	5
ITA	Marco Cecchinato	104	6
ITA	Alessandro Giannessi	109	7
USA	Tennys Sandgren	113	8

• ¹ Rankings are as of 29 May 2017.^[1]

The following players received wildcards into the singles main draw:

• Simone Bolelli
• Dušan Lajović
• Paolo Lorenzi
• Gianluca Mager

The following players received entry from the qualifying draw:

• Matteo Berrettini
• Sebastian Ofner
• João Pedro Sorgi
• Cedrik-Marcel Stebe

• Paolo Lorenzi def. Alessandro Giannessi 6–4, 6–2.

• James Cerretani / Max Schnur def. Denys Molchanov / Franko Škugor 6–3, 3–6, [10–6].