2018 Stockton Challenger
Date	1–7 October
Edition	3rd (men) 4th (women)
Category	ITF Women's Circuit
Prize money	$100,000 (men) $60,000 (women)
Surface	Hard
Location	Stockton, United States
Champions
Men's singles
Lloyd Harris
Women's singles
Madison Brengle
Men's doubles
Darian King / Noah Rubin
Women's doubles
Hayley Carter / Ena Shibahara
← 2017 · Stockton Challenger · 2019 →

The 2018 Stockton Challenger was a professional tennis tournament played on outdoor hard courts. It was the third and fourth editions of the tournament and was part of the 2018 ATP Challenger Tour and the 2018 ITF Women's Circuit. It took place in Stockton, United States, on 1–7 October 2018.

Men's singles main draw entrants

Seeds

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.

Other entrants

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

Women's singles main draw entrants

Seeds

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.

Other entrants

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

Champions

Men's singles

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

Women's singles

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

Men's doubles

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

Women's doubles

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