2017 Seoul Open Challenger
Date	8–14 May
Edition	3rd
Surface	Hard
Location	Seoul, South Korea
Champions
Singles
Thomas Fabbiano
Doubles
Hsieh Cheng-peng / Peng Hsien-yin
← 2016 · Seoul Open Challenger · 2018 →

The 2017 Seoul Open Challenger was a professional tennis tournament played on outdoor hard courts. It was the third edition of the tournament. It was part of the 2017 ATP Challenger Tour. It took place in Seoul, South Korea, on 8–14 May 2017.

Country	Player	Rank1	Seed
TPE	Lu Yen-hsun	56	1
KOR	Chung Hyeon	78	2
ISR	Dudi Sela	99	3
RUS	Konstantin Kravchuk	105	4
CAN	Vasek Pospisil	111	5
SLO	Blaž Kavčič	123	6
UKR	Illya Marchenko	125	7
BEL	Ruben Bemelmans	132	8

• ¹ Rankings as of 1 May 2017.^[1]

The following players received wildcards into the singles main draw:

• Chung Hong
• Chung Yun-seong
• Hong Seong-chan
• Kim Young-seok

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

• Marko Tepavac

The following player received entry into the singles main draw as a special exempt:

• Liam Broady

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

• Alexander Ward

The following players received entry from the qualifying draw:

• Félix Auger-Aliassime
• Austin Krajicek
• Daniel Nguyen
• Shuichi Sekiguchi

The following player received entry as a lucky loser:

• Luke Saville

• Thomas Fabbiano def. Kwon Soon-woo 1–6, 6–4, 6–3.

• Hsieh Cheng-peng / Peng Hsien-yin def. Thomas Fabbiano / Dudi Sela 5–1 ret.