Damir Džumhur Damir Džumhur ( ; born 20 May 1992) is a professional tennis player from Bosnia and Herzegovina. He is currently Bosnia and Herzegovina's No. 1 player. His career-best singles ranking of World No. 23 achieved on 2 July 2018, makes him the highes ...

was the defending champion, but lost in the quarterfinals to

Stan Wawrinka Stanislas "Stan" Wawrinka (; born 28 March 1985) is a Swiss professional tennis player. He reached a career-high Association of Tennis Professionals (ATP) singles ranking of world No. 3 for the first time on 27 January 2014. His career highlight ...

Dominic Thiem Dominic Thiem (; born 3 September 1993) is an Austrian professional tennis player. He has been ranked as high as world No. 3 in singles by the Association of Tennis Professionals, which he first achieved in March 2020. He is the second-highest r ...

won the title after defeating

Martin Kližan Martin Kližan (; born 11 July 1989) is a Slovak former professional tennis player. The winner of the 2006 French Open boys' singles title, Kližan turned pro in 2007 and had a career-high singles ranking of world No. 24, achieved on 27 April ...

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 Mikhail Mikhailovich Youzhny (born 25 June 1982), nicknamed "Misha" and "Colonel" by his fans, is a Russian retired professional tennis player who was ranked inside the top 10 and was the Russian No. 1. He achieved a top-10 ranking by the Assoc ...

in professional tennis.

Seeds

The top four

seeds A seed is an embryonic plant enclosed in a protective outer covering, along with a food reserve. The formation of the seed is a part of the process of reproduction in seed plants, the spermatophytes, including the gymnosperm and angiosperm pl ...

receive a bye into the second round.

Draw

Finals

Top half

Bottom half

Qualifying

Seeds

Qualifiers

Lucky loser

Qualifying draw

First qualifier

Second qualifier

Third qualifier

Fourth qualifier

References

External links

Main draw

Qualifying draw
{{DEFAULTSORT:St. Petersburg Open - Singles, 2018

2018 Singles Eighteen or 18 may refer to: * 18 (number), the natural number following 17 and preceding 19 * one of the years 18 BC, AD 18, 1918, 2018 Film, television and entertainment * ''18'' (film), a 1993 Taiwanese experimental film based on the shor ...

2018 ATP World Tour