Salam Shakar Ali bagged the winner for Iraq to hand Brazilian Lazaroni a debut defeat.
Lazaroni, who replaced Milovan Rajevac in the wake of Qatar less than impressive World Cup qualifying defeat of Vietnam, must now pick his troops up ahead of their crucial World Cup third round qualifying tie with Bahrain on September 2.
Qatar also have Iran and Indonesia for company in Group E.
Group A big guns Iraq will start their third round qualifying campaign at home to Jordan. China and Singapore are the other teams in Group A.