Mendelblatt and Fatih came through the 10-boat quarterfinals and the six-boat semifinals to win the four-boat final.
They finished ahead of 2012 Olympic gold medalist Freddy Loof and crew Anders Ekstrom of Sweden; Mateusz Kusznierewicz and Dominik Zycki of Poland; and Jorge Zarif and Henry Boening of Brazil.
Defending champion Robert Scheidt, a two-time Olympic gold medalist, and crew Bruno Prada of Brazil were eliminated in the semifinal. Top-ranked Diego Negri and crew Sergio Lambertenghi of Italy were eliminated in the semis.
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