2017 AON Open Challenger

Country	Player	Rank1	Seed
GER	Jan-Lennard Struff	49	1
ITA	Andreas Seppi	81	2
ITA	Alessandro Giannessi	91	3
SRB	Laslo Đere	98	4
ITA	Marco Cecchinato	102	5
ARG	Renzo Olivo	114	6
GER	Dustin Brown	116	7
HUN	Márton Fucsovics	117	8

• ¹ Rankings are as of 28 August 2017.^[1]

The following players received wildcards into the singles main draw:

• Matteo Donati
• Julian Ocleppo
• Andreas Seppi
• Stefanos Tsitsipas

The following players received entry into the singles main draw as alternates:

• Riccardo Bonadio
• Federico Gaio
• Hubert Hurkacz

The following players received entry from the qualifying draw:

• Andrea Basso
• Gianluca Di Nicola
• Andrea Pellegrino
• Tim Pütz

• Stefanos Tsitsipas def. Guillermo García López 7–5, 7–6^(7–2).

• Tim Pütz / Jan-Lennard Struff def. Guido Andreozzi / Ariel Behar 7–6^(7–5), 7–6^(10–8).