Russia's 800m runner Yuriy Borzakovskiy has confirmed his retirement with immediate effect.
The 33-year-old, who won gold at the 2004 Olympic Games in Athens, has struggled for fitness and form over the last couple of years.
As a result, the Kratovo-born athlete has decided to call time on his career.
As well as the Olympics, Borzakovskiy also won gold at the European Championships, European Indoor Championships and World Indoor Championships.
Germany
Switzerland
Hungary
Scotland
