Singles
2015 Comerica Bank Challenger
Champion	John Millman
Runner-up	Austin Krajicek
Score	7–5, 2–6, 6–3

Marcos Baghdatis was the defending champion but chose not to compete.

John Millman won the tournament, defeating Austin Krajicek in the final, 7–5, 2–6, 6–3.

Seeds

Draw

Finals

	Semifinals							Final
	1	John Millman	3	6	7
	3	Kyle Edmund	6	4	5
								1	John Millman	7	2	6
								7	Austin Krajicek	5	6	3
	4	Bjorn Fratangelo	3	62
	7	Austin Krajicek	6	77

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	J Millman	6	6
	Alt	A Sarkissian	2	0				1	J Millman	6	6
		B Klein	4	4					G Andreozzi	3	2
		G Andreozzi	6	6											1	J Millman	6	6
		F Dustov	1	6	6										5	T Daniel	1	3
	Q	T Sandgren	6	2	1				F Dustov	77	5	0
	Q	Z Zhang	66	2				5	T Daniel	65	7	6
	5	T Daniel	78	6																		1	J Millman	3	6	7
	3	K Edmund	6	6																		3	K Edmund	6	4	5
	LL	T Niki	1	2				3	K Edmund	7	6
		J Zopp	4	4				Q	D Nguyen	5	3
	Q	D Nguyen	6	6											3	K Edmund	3	6	6
	WC	J Donaldson	77	6											8	Y Nishioka	6	3	3
		G Elias	62	3				WC	J Donaldson	6	3	3
	WC	M Krueger	3	6	3			8	Y Nishioka	4	6	6
	8	Y Nishioka	6	1	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	M Ebden	77	6
		L Broady	64	3				6	M Ebden	2	77	6
	WC	T Haas	6	6				WC	T Haas	6	65	4
		A Rublev	4	3											6	M Ebden	4	2
		Y Bhambri	2	2											4	B Fratangelo	6	6
		E Ymer	6	6					E Ymer	3	4
		M Copil	6	5	2			4	B Fratangelo	6	6
	4	B Fratangelo	3	7	6																	4	B Fratangelo	3	62
	7	A Krajicek	64	6	79																	7	A Krajicek	6	77
	Alt	D Novikov	77	4	67			7	A Krajicek	6	6
	Q	M Zverev	61	7	6			Q	M Zverev	3	4
	WC	TH Fritz	77	5	3										7	A Krajicek	6	6
		G Clezar	6	1	6										2	M Jaziri	3	4
		S Devvarman	2	6	3				G Clezar	3	6	3
		K Khachanov	3	1				2	M Jaziri	6	3	6
	2	M Jaziri	6	6

References

• Main draw
• Qualifying draw