Martin Sinković is a Croatian rower. He is the younger brother of fellow rower Valent Sinković, with whom he won the gold medal in Men's double sculls at the 2016 Summer Olympics in Rio. He had previously won the silver in the men's quadruple sculls at the 2012 Summer Olympics with his brother, David Šain and Damir Martin.

Valent Sinković is a Croatian rower. He is the older brother of fellow rower Martin Sinković with whom he won the gold medal in Men's double sculls at the 2016 Summer Olympics in Rio. He had previously won the silver in the men's quadruple sculls at the 2012 Summer Olympics with his brother, David Šain and Damir Martin.