Singles
2018 Engie Open de Biarritz
Final
Champion	Tamara Korpatsch
Runner-up	Timea Bacsinszky
Score	6–2, 7–5
Events
Singles Doubles
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The 2018 Engie Open de Biarritz – Singles was the singles event of the Open de Biarritz, a professional women's tennis tournament played on outdoor clay courts in the city of Biarritz, in France.

Mihaela Buzărnescu was the defending champion but chose not to participate.

Tamara Korpatsch won the title, defeating Timea Bacsinszky in the final, 6–2, 7–5.

	Semifinals							Final
	WC	Timea Bacsinszky	7	6
	SE	Paula Ormaechea	5	3
								WC	Timea Bacsinszky	2	5
									Tamara Korpatsch	6	7
		Tereza Smitková	4	5
		Tamara Korpatsch	6	7

	First round							Second round							Quarterfinals							Semifinals
	1	C Witthöft	6	77
		E Kostova	4	62				1	C Witthöft	65	62
	WC	M Georges	3	3				Q	R Šramková	77	77
	Q	R Šramková	6	6											Q	R Šramková	2	2r
	WC	T Bacsinszky	5	6	6										WC	T Bacsinszky	6	1
		K Zavatska	7	3	2			WC	T Bacsinszky	6	7
		V Ivakhnenko	4	4				5	I Bara	2	5
	5	I Bara	6	6																		WC	T Bacsinszky	7	6
	3	Y Bonaventure	77	6																		SE	P Ormaechea	5	3
		J Ponchet	62	1				3	Y Bonaventure	7	63	78
		Ç Büyükakçay	6	6					Ç Büyükakçay	5	77	66
		J Čepelová	4	3											3	Y Bonaventure	4	4
		V Cepede Royg	6	4	4										SE	P Ormaechea	6	6
	SE	P Ormaechea	4	6	6			SE	P Ormaechea	7	6
		E Gorgodze	6	68	6				E Gorgodze	5	4
	8	I Khromacheva	3	710	0

	First round							Second round							Quarterfinals							Semifinals
	7	C Perrin	6	2	6
	PR	A Panova	3	6	2			7	C Perrin	3	6	3
	Q	M Partaud	6	3	2				T Smitková	6	4	6
		T Smitková	1	6	6											T Smitková	7	6
		A Bolsova Zadoinov	4	6	6										4	A Kalinina	5	3
		K von Deichmann	6	2	3				A Bolsova Zadoinov	6	5	2
	WC	C Paquet	0	3				4	A Kalinina	4	7	6
	4	A Kalinina	6	6																			T Smitková	4	5
	6	L Siegemund	6	4	60																		T Korpatsch	6	7
	Q	I Shinikova	3	6	77			Q	I Shinikova	4	6	3
	SE	K Zimmermann	6	6				SE	K Zimmermann	6	2	6
		M Di Giuseppe	4	3											SE	K Zimmermann	2	3
		T Korpatsch	7	7												T Korpatsch	6	6
	WC	H Tan	5	5					T Korpatsch	6	6
	Q	O Sáez Larra	6	3	4			Q	O Sáez Larra	1	2
	2	S Sharipova	2	6	2r

• Main Draw