2018 Stockton Challenger

Country	Player	Rank1	Seed
AUS	Jordan Thompson	106	1
USA	Reilly Opelka	125	2
SUI	Henri Laaksonen	128	3
RSA	Lloyd Harris	129	4
NOR	Casper Ruud	136	5
USA	Noah Rubin	138	6
AUS	Alex Bolt	162	7
AUS	Marc Polmans	165	8

• ¹ Rankings are as of September 24, 2018.

The following players received wildcards into the singles main draw:

• Jenson Brooksby
• Tom Fawcett
• Philip Hjorth
• Thai-Son Kwiatkowski

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

• James Duckworth

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

• Kaichi Uchida

The following players received entry from the qualifying draw:

• William Blumberg
• Patrick Kypson
• Tommy Paul
• Alexander Sarkissian

Country	Player	Rank1	Seed
USA	Madison Brengle	95	1
USA	Jessica Pegula	136	2
RUS	Sofya Zhuk	137	3
CZE	Marie Bouzková	147	4
USA	Kristie Ahn	149	5
USA	Jamie Loeb	177	6
BRA	Beatriz Haddad Maia	196	7
USA	Lauren Davis	249	8

• ¹ Rankings as of 1 October 2018.

The following players received a wildcard into the singles main draw:

• Hayley Carter
• Victoria Duval
• Jamie Loeb
• Danielle Willson

The following players received entry into the singles main draw using a junior exempt:

• Whitney Osuigwe

The following players received entry from the qualifying draw:

• Maegan Manasse
• Sanaz Marand
• Amra Sadiković
• Katie Volynets

The following player received entry as a lucky loser:

• Jennifer Elie

• Lloyd Harris def. Marc Polmans 6–2, 6–2.

• Madison Brengle def. Danielle Lao, 7–5, 7–6^(12–10)

• Darian King / Noah Rubin def. Sanchai Ratiwatana / Christopher Rungkat 6–3, 6–4.

• Hayley Carter / Ena Shibahara def. Quinn Gleason / Luisa Stefani, 7–5, 5–7, [10–7]