2019 Oracle Challenger Series – Houston – Men's singles

Bradley Klahn was the defending champion^[1] but lost in the third round to Michael Mmoh.

Houston – Men's singles
2019 Oracle Challenger Series – Houston
Champion	Marcos Giron
Runner-up	Ivo Karlović
Score	7–5, 6–7(5–7), 7–6(11–9)

Main article: 2019 Oracle Challenger Series – Houston

Marcos Giron won the title after defeating Ivo Karlović 7–5, 6–7^(5–7), 7–6^(11–9) in the final.

Seeds

All seeds receive a bye into the second round.

1. Tennys Sandgren (third round)
2. Bradley Klahn (third round)
3. Ivo Karlović (final)
4. Marcos Giron (champion)
5. Jason Jung (quarterfinals)
6. Christopher O'Connell (semifinals)
7. Darian King (second round)
8. Mitchell Krueger (semifinals)
9. Alexey Vatutin (third round)
10. Donald Young (second round)
11. Adrián Menéndez Maceiras (third round)
12. Peđa Krstin (third round)
13. Jenson Brooksby (third round)
14. Michael Mmoh (quarterfinals, retired)
15. Michael Redlicki (quarterfinals)
16. Sekou Bangoura (third round)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• ITF = ITF entry
• PR = Protected ranking
• SR = Special ranking
• SE = Special exempt
• JE = Junior exempt
• JR = Junior Accelerator Programme entrant
• CO = College Accelerator Programme entrant
• NG = Next Gen Accelerator Program entrant
• w/o = Walkover
• r = Retired
• d = Defaulted

Finals

	Quarterfinals							Semifinals							Final
	15	Michael Redlicki	4	4
	8	Mitchell Krueger	6	6
								8	Mitchell Krueger	64	2
								4	Marcos Giron	77	6
	4	Marcos Giron	6	2	6
	5	Jason Jung	1	6	2
															4	Marcos Giron	7	65	711
															3	Ivo Karlović	5	77	69
	Q	Alexis Galarneau	63	67
	3	Ivo Karlović	77	79
								3	Ivo Karlović	65	6	6
								6	Christopher O'Connell	77	3	4
	6	Christopher O'Connell	5
	14	Michael Mmoh	0r

Top half

Section 1

	First round							Second round							Third round							Quarterfinals
								1	T Sandgren	6	7
		E Leshem	6	6					E Leshem	3	5
		Christopher Heyman	4	4											1	T Sandgren	77	4	4
		G Nanda	6	6											15	Mi Redlicki	65	6	6
	WC	O Crawford	4	3					G Nanda	3	3
								15	Mi Redlicki	6	6
																						15	Mi Redlicki	4	4
																						8	M Krueger	6	6
								12	P Krstin	6	1	6
		N Chappell	6	3	77				N Chappell	1	6	1
		S Fanselow	1	6	65										12	P Krstin	64	4
	WC	Z Khan	4	3											8	M Krueger	77	6
		F Meligeni Alves	6	6					F Meligeni Alves	2	2
								8	M Krueger	6	6

Section 2

	First round							Second round							Third round							Quarterfinals
								4	M Giron	77	67	6
	WC	B Holt	6	7				WC	B Holt	64	79	2
		C Sinclair	1	5											4	M Giron	6	4	6
		R Matos	63	4											13	J Brooksby	2	6	3
		G Villanueva	77	6					G Villanueva	2	2
								13	J Brooksby	6	6
																						4	M Giron	6	2	6
																						5	J Jung	1	6	2
								9	A Vatutin	1	7	6
		A Sarkissian	1	1					D Hidalgo	6	5	3
		D Hidalgo	6	6											9	A Vatutin	5	2
	WC	Sumit Sarkar	1	0											5	J Jung	7	6
		D Nguyen	6	6					D Nguyen	3	2
								5	J Jung	6	6

Bottom half

Section 3

	First round							Second round							Third round							Quarterfinals
								7	D King	63	5
		G Escobar	6	77					G Escobar	77	7
		E Zhu	2	64												G Escobar	3	3
	Q	A Galarneau	6	6											Q	A Galarneau	6	6
		G López Villaseñor	3	3				Q	A Galarneau	3	6	6
								10	D Young	6	3	0
																						Q	A Galarneau	63	67
																						3	I Karlović	77	79
								16	S Bangoura	0	6	6
		A Ritschard	3	5					P Heller	6	4	2
		Peter Heller	6	7											16	S Bangoura	65	6	4
		L Caruana	6	6											3	I Karlović	77	2	6
	WC	Mohamed Abdel-Aziz	2	4					L Caruana	5	4
								3	I Karlović	7	6

Section 4

	First round							Second round							Third round							Quarterfinals
								6	C O'Connell	6	5	6
		MF Descotte	4	3					A Vavassori	3	7	4
		A Vavassori	6	6											6	C O'Connell	77	6
		Gage Brymer	2	65											11	A Menéndez Maceiras	63	4
		C Altamirano	6	77					C Altamirano	4	0
								11	A Menéndez Maceiras	6	6
																						6	C O'Connell	5
																						14	M Mmoh	0r
								14	M Mmoh	4	6	6
		E King	6	4	5				R Sarmiento	6	4	4
		R Sarmiento	4	6	7										14	M Mmoh	5	77	77
		FC Jianu	6	6											2	B Klahn	7	65	65
	Q	Alafia Ayeni	4	2					FC Jianu	5	3
								2	B Klahn	7	6