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.
Singles main draw entrants Seeds Country Player Rank1 SeedLu Yen-hsun561Chung Hyeon782Dudi Sela993Konstantin Kravchuk1054Vasek Pospisil1115Blaž Kavčič1236Illya Marchenko1257Ruben Bemelmans1328 1 Rankings as of 1 May 2017.
Other entrants 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
Champions Singles
Thomas Fabbiano def. Kwon Soon-woo 1–6, 6–4, 6–3.
Doubles
Hsieh Cheng-peng / Peng Hsien-yin def. Thomas Fabbiano / Dudi Sela 5–1 ret.
References