Scot says he struggled with confidence after high-profile defeats . Andy Murray was plagued by self doubt ahead of his double triumph in this year . He won Olympic gold and Paris Open crown in quick succession . the whole two weeks of the Olympics were just unbelievable , '' he said . Coach Ivan Lendl is credited with improving his fortunes 2012 .
Scot says he struggled with confidence after high-profile defeats . Andy Murray was plagued by self doubt ahead of his double triumph in this year . He won Olympic gold and Paris Open crown in quick succession . Coach Ivan Lendl is credited with improving his fortunes 2012 .