The 2005 Croatia Open Umag was a men's tennis tournament played on outdoor clay courts. It was the 16th edition of the Croatia Open Umag, and was part of the International Series of the 2005 ATP Tour. It took place at the International Tennis Center in Umag, Croatia, from 25 July through 31 July 2005. Second-seeded Guillermo Coria won the singles title.
See main article: 2005 Croatia Open Umag – Singles. Guillermo Coria defeated Carlos Moyá 6–2, 4–6, 6–2[1]
See main article: 2005 Croatia Open Umag – Doubles. Jiří Novák / Petr Pála defeated Michal Mertiňák / David Škoch, 6–3, 6–3