2018 Porsche Tennis Grand Prix – Singles

Singles
2018 Porsche Tennis Grand Prix
Champion	Karolína Plíšková
Runner-up	CoCo Vandeweghe
Score	7–6(7–2), 6–4
Draw	28
Seeds	8

Laura Siegemund was the defending champion, but lost in the second round to CoCo Vandeweghe.

Karolína Plíšková won the title, defeating Vandeweghe in the final, 7–6^(7–2), 6–4.

15-year-old Marta Kostyuk became the youngest player to win a main draw match in Stuttgart since Martina Hingis in October 1994.^[1]

The top four seeds received a bye into the second round.

	Semifinals							Final
	WC	CoCo Vandeweghe	6	6
	6	Caroline Garcia	4	2
								WC	CoCo Vandeweghe	62	4
								5	Karolína Plíšková	77	6
	5	Karolína Plíšková	6	6
		Anett Kontaveit	4	2

	First round							Second round							Quarterfinals							Semifinals
								1	S Halep	4	6	6
		D Kasatkina	2	2					M Rybáriková	6	2	3
		M Rybáriková	6	6											1	S Halep	4	1
		B Strýcová	4	3											WC	C Vandeweghe	6	6
	WC	L Siegemund	6	6				WC	L Siegemund	4	6	3
	WC	C Vandeweghe	6	6				WC	C Vandeweghe	6	4	6
	7	S Stephens	1	0																		WC	C Vandeweghe	6	6
																						6	C Garcia	4	2
								3	E Svitolina	2	6	3
		J Görges	2	2				Q	M Vondroušová	6	1	2r
	Q	M Vondroušová	6	6											3	E Svitolina	77	4	2
	Q	M Kostyuk	6	6											6	C Garcia	64	6	6
	WC	A Lottner	4	1				Q	M Kostyuk	1	6	5
	WC	M Sharapova	6	66	4			6	C Garcia	6	3	7
	6	C Garcia	3	78	6

	First round							Second round							Quarterfinals							Semifinals
	5	Ka Plíšková	6	6
		K Bertens	2	2				5	Ka Plíšková	77	6
	Q	V Kudermetova	77	6				Q	V Kudermetova	64	3
		C Suárez Navarro	65	2											5	Ka Plíšková	5	7	6
	LL	C Witthöft	3	2											4	J Ostapenko	7	5	4
	Q	Z Diyas	6	6				Q	Z Diyas	3	0
								4	J Ostapenko	6	6
																						5	Ka Plíšková	6	6
	8	P Kvitová	3	2																			A Kontaveit	4	2
		A Kerber	6	6					A Kerber	0	0r
		K Mladenovic	7	63	65				A Kontaveit	6	2
		A Kontaveit	5	77	77											A Kontaveit	7	66	6
		M Keys	67	7	4											A Pavlyuchenkova	5	78	4
		A Pavlyuchenkova	79	5	6				A Pavlyuchenkova	7	0
								2	G Muguruza	5	0r

	First round							Second round							Qualifying competition
	1	Alizé Cornet	6	6
		Daniela Seguel	1	3
								1	Alizé Cornet	77	77
									Conny Perrin	62	62
		Conny Perrin	6	77
		Tamara Korpatsch	1	64
															1	Alizé Cornet	6	2	3
																Marta Kostyuk	4	6	6
	WC	Julia Middendorf	1	2
		Marta Kostyuk	6	6
									Marta Kostyuk	7	2
									Alexandra Cadanțu	5	0r
		Alexandra Cadanțu	6	7
	8	Bernarda Pera	4	5

	First round							Second round							Qualifying competition
	2	Zarina Diyas	6	6
		Marie Bouzková	4	2
								2	Zarina Diyas	6	6
								WC	Anna Gabric	3	1
		Fanny Stollár	5	64
	WC	Anna Gabric	7	77
															2	Zarina Diyas	6	4	6
															5	Kaia Kanepi	4	6	4
		Dayana Yastremska	6	6
		Marina Melnikova	3	3
									Dayana Yastremska	2	4
								5	Kaia Kanepi	6	6
		Chloé Paquet	2	1
	5	Kaia Kanepi	6	6

	First round							Second round							Qualifying competition
	3	Carina Witthöft	6	6
		Michaela Hončová	0	1
								3	Carina Witthöft	2	6	6
									Anna Zaja	6	0	3
		Anna Zaja	6	6
		Katharina Hobgarski	4	4
															3	Carina Witthöft	7	1	3
															6	Markéta Vondroušová	5	6	6
		Fiona Ferro	5	1
		Océane Dodin	7	6
									Océane Dodin	3	6	1
								6	Markéta Vondroušová	6	1	6
		Karolína Muchová	65	6	2
	6	Markéta Vondroušová	77	4	6

	First round							Second round							Qualifying competition
	4	Hsieh Su-wei	2	7	6
	WC	Katharina Gerlach	6	5	2
								4	Hsieh Su-wei	3	3
									Veronika Kudermetova	6	6
		Petra Krejsová	2	3
		Veronika Kudermetova	6	6
																Veronika Kudermetova	6	6
															7	Varvara Lepchenko	2	4
	WC	Lena Rüffer	4	6	6
		Paula Badosa Gibert	6	3	0
								WC	Lena Rüffer	4	1
								7	Varvara Lepchenko	6	6
		Magdalena Fręch	2	61
	7	Varvara Lepchenko	6	77

• Main draw
• Qualifying draw