The 2017 Gwangju Open was a professional tennis tournament played on hard courts. It was the 2nd edition of the tournament which was part of the 2017 ATP Challenger Tour. It took place in Gwangju, South Korea between 18 and 24 September 2017.

Country	Player	Rank1	Seed
AUS	Jordan Thompson	70	1
CAN	Peter Polansky	128	2
AUS	Matthew Ebden	140	3
KOR	Lee Duck-hee	163	4
JPN	Tatsuma Ito	165	5
JPN	Yasutaka Uchiyama	197	6
JPN	Hiroki Moriya	199	7
KOR	Kwon Soon-woo	208	8
EGY	Mohamed Safwat	211	9

• ¹ Rankings as of 11 September 2017.^[1]

The following players received wildcards into the singles main draw:

• Hong Seong-chan
• Kim Cheong-eui
• Park Jun-sang
• Sin Dong-hak

The following players received entry into the singles main draw using a protected ranking:

• Bradley Klahn

The following players received entry from the qualifying draw:

• Yuya Kibi
• Marinko Matosevic
• Makoto Ochi
• Yang Tsung-hua

The following players received entry as lucky losers:

• Lorenzo Frigerio
• Kento Takeuchi

• Matthias Bachinger def. Yang Tsung-hua 6–3, 6–4.

• Chen Ti / Ben McLachlan def. Jarryd Chaplin / Luke Saville 2–6, 7–6^(7–1), [10–1].