The silver went to Czech Ondrej Synek (6:46.40), and Norwegian competition rower Olaf Tufte bagged the bronze.
Martin was a member of the Croatian quadruple sculls that won the silver at the 2012 Summer Olympics.
ZAGREB, May 31
(Hina) - Croatian Damir Martin on Sunday won the gold
in the men's single sculls at the 2015 European Rowing Championships
in Poznan, Poland, and he also set the best European time in this boat
class, 6:41.65.