Singles
2015 Engie Open Nantes Atlantique
Final
Champion	Mathilde Johansson
Runner-up	Andreea Mitu
Score	6–3, 6–4
Events
Singles Doubles
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Kateřina Siniaková was the defending champion, but lost to Mathilde Johansson in the semifinals.

Johansson won the title, defeating Andreea Mitu in the final, 6–3, 6–4.

	Semifinals							Final
	6	Louisa Chirico	6	0	4
	3	Andreea Mitu	2	6	6
								3	Andreea Mitu	3	4
									Mathilde Johansson	6	6
		Mathilde Johansson	6	4	6
	2	Kateřina Siniaková	4	6	2

	First round							Second round							Quarterfinals							Semifinals
	1	A-L Friedsam	7	6
		İ Soylu	5	4				1	A-L Friedsam	6	6
	WC	F Ferro	5	4				Q	S Shapatava	4	3
	Q	S Shapatava	7	6											1	A-L Friedsam	6	3	2
	WC	T Andrianjafitrimo	5	77	6										6	L Chirico	2	6	6
	JE	J Teichmann	7	64	2			WC	T Andrianjafitrimo	2	3
	LL	C Feuerstein	1	3				6	L Chirico	6	6
	6	L Chirico	6	6																		6	L Chirico	6	0	4
	3	A Mitu	6	6																		3	A Mitu	2	6	6
		O Dodin	3	2				3	A Mitu	6	6
		A Vrljić	6	6					A Vrljić	3	4
	WC	I Ramialison	4	4											3	A Mitu	6	713
		T Paszek	6	6												T Paszek	2	611
	Q	K Stuchlá	4	3					T Paszek	6	6
		M Georges	66	6	6				M Georges	4	2
	8	A Panova	78	1	1

	First round							Second round							Quarterfinals							Semifinals
	7	P Parmentier	6	1	6
		S Foretz	1	6	2			7	P Parmentier	2	4
		M Johansson	77	6					M Johansson	6	6
		N Abduraimova	65	1												M Johansson	6	77
		S Soler Espinosa	0	3												A Kalinina	1	63
		A Kalinina	6	6					A Kalinina	6	6
		R Voráčová	2	3				4	A Sevastova	4	2
	4	A Sevastova	6	6																			M Johansson	6	4	6
	5	Kr Plíšková	4	5																		2	K Siniaková	4	6	2
		Y Beygelzimer	6	7					Y Beygelzimer	5	2
	Q	X Knoll	6	6				Q	X Knoll	7	6
	Q	C Paquet	4	3											Q	X Knoll	66	4
	WC	J Ponchet	1	1											2	K Siniaková	78	6
		T Martincová	6	6					T Martincová	5	6	68
		P Leykina	65	1				2	K Siniaková	7	4	710
	2	K Siniaková	77	6

• Main draw