2018 Fairfield Challenger

Country	Player	Rank1	Seed
AUS	Jordan Thompson	106	1
RSA	Lloyd Harris	121	2
USA	Noah Rubin	127	3
USA	Reilly Opelka	129	4
ESP	Adrián Menéndez Maceiras	130	5
NOR	Casper Ruud	135	6
CRO	Ivo Karlović	137	7
AUS	Alex Bolt	158	8

• ¹ Rankings are as of October 1, 2018.^[1]

The following players received wildcards into the singles main draw:

• Collin Altamirano
• Axel Geller
• Alex Rybakov
• J. J. Wolf

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

• Maxime Janvier

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

• Darian King

The following players received entry from the qualifying draw:

• Sebastian Fanselow
• Evan King
• Kevin King
• Tommy Paul

The following player received entry as a lucky loser:

• Mitchell Krueger

• Bjorn Fratangelo def. Alex Bolt 6–4, 6–3.

• Sanchai Ratiwatana / Christopher Rungkat def. Harri Heliövaara / Henri Laaksonen 6–0, 7–6^(11–9).