The Arsenal striker was left out of France's line-up for the win over Honduras and says he was upset with the manager's decision, despite coming on as a second-half substitute
A Karim Benzema brace plus an own goal gave Didier Deschamps' side a convincing victory in Group E, with Giroud introduced in the 78th minute in place of Mathieu Valbuena.
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“Yes, it was a disappointment, I will not say otherwise,” he told L'Equipe. “But my little case does not come before the group. I am disappointed, but I respect the choices of the manager.”
However, Giroud insists he is “really happy” and believes the win could kick-start a major tilt at World Cup glory.
"It leaves a lot of energy. The time doesn't pass quickly, but I'm really happy,” he added.
“I hope it is the beginning of a beautiful story.”
France face Switzerland next, on June 20, before rounding off their group fixtures against Ecuador.