Robin Haase Robin Haase (; born 6 April 1987) is a Dutch professional tennis player. He reached his career-high Association of Tennis Professionals, ATP singles ranking of world No. 33 in July 2012 and his highest doubles ranking of world No. 29 in May 2023 ...

and

Philipp Oswald Philipp Oswald (; born 23 January 1986) is an Austrian former professional tennis player who primarily played doubles events on the ATP Tour. On 7 December 2009, he reached his highest ATP singles ranking of world No. 206, and his highest doubl ...

were the reigning champions from when the tournament was last held in

2019 This was the year in which the first known human case of COVID-19 was documented, preceding COVID-19 pandemic, the pandemic which was declared by the World Health Organization the following year. Up to that point, 2019 had been described as ...

, but chose not to defend their title.

Fernando Romboli Fernando Romboli de Souza (born 4 January 1989) is a Brazilian professional tennis player who specializes in doubles. He has a career-high ATP doubles ranking of world No. 52, achieved on 9 June 2025. He also reached a singles ranking of No. 2 ...

and

David Vega Hernández David Vega Hernández (; born 23 June 1994) is a Spanish professional tennis player. He has a career-high ATP doubles ranking of world No. 28 achieved on 21 July 2014. He also has a career high ATP singles ranking of No. 403 achieved on 13 Febr ...

won the title, defeating

Tomislav Brkić Tomislav Brkić (; born 9 March 1990) is a Bosnian professional tennis player. Brkić achieved a career-high in doubles of World No. 40 on 17 January 2022. He has won two ATP doubles titles one with Nikola Ćaćić and one with Francisco Cabral ...

and

Nikola Ćaćić Nikola Ćaćić ( sr-Cyrl, Никола Ћаћић, ; born 7 December 1990) is a Serbian former professional tennis player. He has a career-high ranking of World No. 35 in doubles achieved on 8 November 2021. He has won three doubles titles in th ...

in the final, 6–3, 7–5.

Seeds

Draw

References

External links

Main Draw
{{DEFAULTSORT:2021 Croatia Open Umag - Doubles Croatia Open Umag - Doubles