File photograph shows Britain's four-time Olympic champion Matthew Pinsent who has announced his retirement from rowing. A file photograph shows Britain's four-time Olympic champion Matthew Pinsent who announced his retirement from rowing, November 30, 2004. In this file photogrpah taken on August 21, 2004, Pinsent is seen displaying his gold medal after the men's fours final at the Athens 2004 Olympic Games. REUTERS/Toby Melville