Sanchez's shock 400m Hurdles gold the highlight on day of surprises - London 2012 Day Four report

London, UK - Yelena Isinbayeva lost her first Olympic Pole Vault final for twelve years, Valerie Adams was defeated in the Shot Put for the first time since 2005 in a major outdoor championships, Javier Culson's 2012 winning streak came to an end in the 400m Hurdles, and the US presence in the men's 400m was non-existent.

But as surprising as most of tonight's finals were, the most shocking was the return to form of Felix Sanchez in the 400m Hurdles. His Olympic victory eight years ago in Athens was his last major victory, marking the end of his dominance that had spanned several seasons.