2019 Oracle Challenger Series – Houston – Men's singles

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)

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

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

All seeds receive a bye into the second round.

	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

	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

	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

	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

	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

• Main draw
• Qualifying draw