Djokovic says he is close to his peak for US Open semi-final after extra days off - video

World No1 Novak Djokovic says he feels close to peak fitness after going through to the semi-finals of the US Open on Tuesday night. His quarter-final opponent, Jo-Wilfried Tsonga, was forced to retire from the match injured. The Serb has been afforded extra time for recovery in New York, having completed only two of five matches. Photograph: Alex Goodlett/Getty Images Novak Djokovic into US Open semi-finals after Jo-Wilfried Tsonga retires Andy Murray 'kept foot on the gas' in US Open win over ...