Andy Murray says he plays with confidence after high - profile defeats . Scot was plagued by self doubt ahead of his double triumph in Beijing . He won Olympic gold and U.S. Open title in quick succession . Coach Ivan Lendl is credited with improving his form this year .
Andy Murray says he struggled with confidence after high-profile defeats . Scot was plagued by self doubt ahead of his double triumph in 2012 . He won Olympic gold and U.S. Open crown in quick succession . Coach Ivan Lendl is credited with improving his fortunes this year .