Ivan Dodig Ivan Dodig (; born 2 January 1985) is a Croatian professional tennis player who specializes in doubles. He reached his career-high doubles ranking of World No. 2 in September 2023. He is a seven-time Grand Slam champion, having won men's double ...

and

Mate Pavić Mate Pavić (; born 4 July 1993) is a Croatian professional tennis player. He is the current world No. 1 in doubles by the ATP. Pavić is one of only six men to complete the Career Golden Slam in doubles. He is a seven-time Grand Slam champio ...

were the defending champions, but chose not to participate together this year. Dodig played alongside

Jean-Julien Rojer Jean-Julien Rojer ( "John Julian" , ; born 25 August 1981) is a Dutch professional tennis player from Curaçao, who specializes in doubles. He reached his career-high doubles ranking of world No. 3 in November 2015. He is a four-time Grand Sla ...

, but lost in the quarterfinals to

Ben McLachlan Ben McLachlan ( ; マクラクラン勉, ''Makurakuran Ben''; born 10 May 1992) is a Japanese former professional tennis player who previously represented New Zealand. He is a doubles specialist with a career-high ATP ranking of world No. 18, ...

and

Jan-Lennard Struff Jan-Lennard Struff (; born 25 April 1990) is a German professional tennis player. He reached his career-high Association of Tennis Professionals, ATP singles and doubles rankings of world No. 21 on 19 June 2023 and on 22 October 2018 respectively. ...

. Pavić teamed up with

Oliver Marach Oliver Marach (born 16 July 1980) is a former Austrian professional tennis player who primarily specialised in doubles. He achieved his highest singles ranking of world No. 82 in August 2005, but achieved most of his success in doubles where he ...

, but lost in the final to

Julio Peralta Julio Leonardo Peralta Martínez (; born 9 September 1981) is an inactive professional tennis player from Chile. Peralta has found success in the late stage of his career, reaching no. 29 in the ATP rankings in doubles. He captured six doubles tit ...

and

Horacio Zeballos Horacio Zeballos Jr. (, ; born 27 April 1985) is an Argentine professional tennis player. He reached a career-high doubles ranking of world No. 1 on 6 May 2024, becoming the first Argentinian man to achieve the feat. He is a Grand Slam champion ...

, 1–6, 6–4, –10

Seeds

Draw

Qualifying

Seeds

Qualifiers

Martin Kližan Martin Kližan (; born 11 July 1989) is a Slovak professional tennis player. He has a career-high singles ATP rankings, ranking of world No. 24, achieved on 27 April 2015, and No. 73 in doubles, achieved on 4 May 2015. He won the 2006 French Ope ...

Jozef Kovalík Jozef Kovalík (; born 4 November 1992) is a Slovak professional tennis player who competes on the ATP Challenger Tour. He has a career-high ATP singles ranking of world No. 80 and a doubles ranking of No. 245 reached in 2018. He is currently t ...

Qualifying draw

References

Main Draw

Qualifying Draw
{{DEFAULTSORT:2018 German Open - Doubles German Open - Doubles 2018 International German Open