The 2018 Chengdu Open was a men's tennis tournament played on outdoor hard courts. It was the 3rd edition of the Chengdu Open and part of the ATP World Tour 250 series of the 2018 ATP World Tour. It took place at the Sichuan International Tennis Center in Chengdu, China, from September 24 to 30.

Country	Player	Rank1	Seed
ITA	Fabio Fognini	13	1
KOR	Chung Hyeon	23	2
GEO	Nikoloz Basilashvili	31	3
FRA	Adrian Mannarino	32	4
FRA	Gaël Monfils	42	5
AUS	Matthew Ebden	48	6
POR	João Sousa	49	7
USA	Tennys Sandgren	58	8

• ¹ Rankings are as of September 17, 2018

The following players received wildcards into the singles main draw:

• Tseng Chun-hsin
• Wu Yibing
• Zhang Ze

The following players received entry from the qualifying draw:

• Ruben Bemelmans
• Prajnesh Gunneswaran
• Lloyd Harris
• Bernard Tomic

The following player received entry as a lucky loser:

• Félix Auger-Aliassime

Before the tournament

• Kevin Anderson →replaced by Tim Smyczek
• Pablo Carreño Busta →replaced by Vasek Pospisil
• Márton Fucsovics →replaced by Radu Albot
• Nicolás Jarry →replaced by Evgeny Donskoy
• Leonardo Mayer →replaced by Guido Pella
• John Millman →replaced by Marcos Baghdatis
• Frances Tiafoe →replaced by Taylor Fritz
• Zhang Ze →replaced by Félix Auger-Aliassime

• Mischa Zverev

Country	Player	Country	Player	Rank1	Seed
CRO	Ivan Dodig	CRO	Mate Pavić	28	1
CHI	Julio Peralta	ARG	Horacio Zeballos	64	2
IND	Divij Sharan	NZL	Artem Sitak	73	3
MEX	Santiago González	PAK	Aisam-ul-Haq Qureshi	86	4

• ¹ Rankings are as of September 1, 2018

The following pairs received wildcards into the doubles main draw:

• Gao Xin / Te Rigele
• Gong Maoxin / Zhang Ze

The following pairs received entry as alternates:

• Ruben Bemelmans / Prajnesh Gunneswaran

Before the tournament

• Fabio Fognini (fatigue)

• Bernard Tomic def. Fabio Fognini, 6–1, 3–6, 7–6^(9-7)

• Ivan Dodig / Mate Pavić def. Austin Krajicek / Jeevan Nedunchezhiyan, 6–2, 6–4

• Official website