Giroud struck for France last week, making it 13 consecutive years he has scored for Les Bleus.
Guendouzi told Telefoot: "He is a player who misses very few opportunities once in front of goal, so the statistics speak for themselves.
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"He is a player who works a lot for the team and this time too he was rewarded."
Giroud scored the winner in the 3-2 defeat of Chile last week.