2019 Oracle Challenger Series – Houston

Country	Player	Rank1	Seed
USA	Tennys Sandgren	69	1
USA	Bradley Klahn	105	2
CRO	Ivo Karlović	106	3
USA	Marcos Giron	124	4
TPE	Jason Jung	130	5
AUS	Christopher O'Connell	140	6
BAR	Darian King	165	7
USA	Mitchell Krueger	196	8
RUS	Alexey Vatutin	197	9
USA	Donald Young	233	10
ESP	Adrián Menéndez Maceiras	236	11
SRB	Peđa Krstin	238	12
USA	Jenson Brooksby	274	13
USA	Michael Mmoh	294	14
USA	Michael Redlicki	315	15
USA	Sekou Bangoura	317	16

• ¹ Rankings are as of 4 November 2019.

The following players received wildcards into the singles main draw:

• Mohamed Abdel-Aziz
• Oliver Crawford
• Brandon Holt
• Zane Khan
• Sumit Sarkar

The following players received entry from the qualifying draw:

• Alafia Ayeni
• Alexis Galarneau

Country	Player	Rank1	Seed
USA	Danielle Collins	31	1
USA	Taylor Townsend	84	2
BEL	Kirsten Flipkens	95	3
UKR	Katarina Zavatska	110	4
ROU	Patricia Maria Țig	111	5
USA	Caty McNally	118	6
SUI	Stefanie Vögele	119	7
USA	Francesca Di Lorenzo	121	8
USA	Whitney Osuigwe	132	9
LUX	Mandy Minella	137	10
USA	Usue Maitane Arconada	140	11
USA	Allie Kiick	147	12
USA	Ann Li	148	13
USA	Caroline Dolehide	154	14
USA	Sachia Vickery	158	15
USA	Varvara Lepchenko	170	15

• ¹ Rankings are as of 4 November 2019.[3]

The following players received wildcards into the singles main draw:

• Danielle Collins
• Linda Huang
• Katarina Jokić
• Bethanie Mattek-Sands
• CoCo Vandeweghe

The following player received entry into the singles main draw through protected ranking:

• Irina Falconi

The following players received entry from the qualifying draw:

• Catherine Bellis
• Sophie Chang

The following player received entry into the main draw as lucky loser:

• Kayla Day

• Sara Errani → replaced by Fanny Stollár
• Jaimee Fourlis → replaced by Hanna Chang
• Mayo Hibi → replaced by Kayla Day
• Katarzyna Kawa → replaced by Grace Min
• Kristína Kučová → replaced by Mari Osaka
• Anastasiya Komardina → replaced by Catherine Harrison
• Asia Muhammad → replaced by Deniz Khazaniuk
• Jessica Pegula → replaced by Hailey Baptiste
• Olivia Rogowska → replaced by Gabriela Cé
• Katherine Sebov → replaced by Giuliana Olmos
• Katie Swan → replaced by Anna Danilina
• Patricia Maria Țig → replaced by Quinn Gleason

Country	Player	Country	Player	Rank1	Seed
CAN	Sharon Fichman	JPN	Ena Shibahara	119	1
AUS	Ellen Perez	BRA	Luisa Stefani	140	2
MEX	Giuliana Olmos	USA	Sabrina Santamaria	143	3
HUN	Fanny Stollár	USA	Taylor Townsend	180	4

• ¹ Rankings as of 4 November 2019.

The following pair received a wildcard into the doubles main draw:

• Hailey Baptiste / Ellie Douglas

• Marcos Giron def Ivo Karlović 7–5, 6–7^(5–7), 7–6^(11–9).

• Kirsten Flipkens def. CoCo Vandeweghe 7–6^(7–4), 6–4

• Jonathan Erlich / Santiago González def. Ariel Behar / Gonzalo Escobar 6–3, 7–6^(7–4).

• Ellen Perez / Luisa Stefani def. Sharon Fichman / Ena Shibahara, 1–6, 6–4, [10–5]