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Singles
2018 St. Petersburg Open
Final
Champion	Dominic Thiem
Runner-up	Martin Kližan
Score	6–3, 6–1
Details
Draw	28 (4 Q / 3 WC )
Seeds	8
Events
Singles Doubles
← 2017 · St. Petersburg Open · 2019 →

Damir Džumhur was the defending champion, but lost in the quarterfinals to Stan Wawrinka.

Dominic Thiem won the title after defeating Martin Kližan 6–3, 6–1 in the final. Notably, this was Kližan's first defeat in a deciding match, after 10 consecutive titles at ATP World Tour level.

The tournament marked the last appearance of Mikhail Youzhny in professional tennis.

Seeds

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

1. Dominic Thiem (champion)
2. Fabio Fognini (second round)
3. Marco Cecchinato (quarterfinals)
4. Karen Khachanov (second round)
5. Roberto Bautista Agut (semifinals)
6. Damir Džumhur (quarterfinals)
7. Denis Shapovalov (quarterfinals)
8. Daniil Medvedev (quarterfinals)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• SE = Special exempt
• PR = Protected ranking
• ITF = ITF entry
• JE = Junior exempt
• w/o = Walkover
• r = Retired
• d = Defaulted
• SR = Special ranking

Finals

	Semifinals							Final
	1	Dominic Thiem	6	6
	5/WC	Roberto Bautista Agut	4	3
								1	Dominic Thiem	6	6
									Martin Kližan	3	1
	WC	Stan Wawrinka	6	3	5
		Martin Kližan	4	6	7

Top half

	First round							Second round							Quarterfinals							Semifinals
								1	D Thiem	7	6
		A Rublev	4	6					J-L Struff	6	4
		J-L Struff	6	7											1	D Thiem	6	3	7
		M Kukushkin	7	2											8	D Medvedev	2	6	6
		D Istomin	5	4					M Kukushkin	3	4
		J Sousa	4	1				8	D Medvedev	6	6
	8	D Medvedev	6	6																		1	D Thiem	6	6
																						5/WC	R Bautista Agut	4	3
								3	M Cecchinato	7	7
	LL	R Bemelmans	2	6	5				L Lacko	5	6
		L Lacko	6	4	7										3	M Cecchinato	6	3
		M Bašić	6	4											5/WC	R Bautista Agut	7	6
	WC	M Youzhny	7	6				WC	M Youzhny	6	6	3
	Q	L Vanni	5	2				5/WC	R Bautista Agut	7	3	6
	5/WC	R Bautista Agut	7	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	D Džumhur	7	6
	Q	L Miedler	5	3				6	D Džumhur	6	6
	Q	I Ivashka	6	3	4				G Pella	4	4
		G Pella	4	6	6										6	D Džumhur	3	4
		A Bedene	5	6											WC	S Wawrinka	6	6
	WC	S Wawrinka	7	7				WC	S Wawrinka	7	7
								4	K Khachanov	6	6
																						WC	S Wawrinka	6	3	5
	7	D Shapovalov	7	6																			M Kližan	4	6	7
	Q	A Menéndez Maceiras	6	2				7	D Shapovalov	7	4	6
		G García López	6	6	3				M Berrettini	6	6	0
		M Berrettini	7	2	6										7	D Shapovalov	6	5	3
		E Donskoy	4	4												M Kližan	3	7	6
		M Kližan	6	6					M Kližan	6	6
								2	F Fognini	3	4

Qualifying

Seeds

1. Lorenzo Sonego (first round)
2. Ilya Ivashka (qualified)
3. Ruben Bemelmans (qualifying competition, lucky loser)
4. Viktor Troicki (first round)
5. Adrián Menéndez Maceiras (qualified)
6. Stéphane Robert (first round)
7. Luca Vanni (qualified)
8. Alexey Vatutin (first round)

Qualifiers

1. Luca Vanni
2. Ilya Ivashka
3. Adrián Menéndez Maceiras
4. Lucas Miedler

Lucky loser

1. Ruben Bemelmans

Qualifying draw

First qualifier

	First round							Qualifying competition
	1	Lorenzo Sonego	6	4	5
	WC	Roman Safiullin	3	6	7
								WC	Roman Safiullin	4	4
								7	Luca Vanni	6	6
		Daniel Brands	4	6	5
	7	Luca Vanni	6	4	7

Second qualifier

	First round							Qualifying competition
	2	Ilya Ivashka	2	7	6
	Alt	Evgeny Karlovskiy	6	6	4
								2	Ilya Ivashka	7	7
								WC	Evgenii Tiurnev	6	6
	WC	Evgenii Tiurnev	6	6
	6	Stéphane Robert	3	4

Third qualifier

	First round							Qualifying competition
	3	Ruben Bemelmans	6	4	7
	PR	Egor Gerasimov	2	6	6
								3	Ruben Bemelmans	6	2	3
								5	Adrián Menéndez Maceiras	4	6	6
		Ivan Nedelko	2	3
	5	Adrián Menéndez Maceiras	6	6

Fourth qualifier

	First round							Qualifying competition
	4	Viktor Troicki	2	3
		Lucas Miedler	6	6
									Lucas Miedler	7	6
									Uladzimir Ignatik	5	2
		Uladzimir Ignatik	7	6
	8	Alexey Vatutin	5	4

References

1. Eichenholz, Andrew. "'The Colonel' Mikhail Youzhny Gives Final Salute In St. Petersburg". atpworldtour.com. Retrieved 22 September 2018.

External links

• Main draw
• Qualifying draw

• St. Petersburg Open
• 2018 ATP World Tour