And Deschamps has said why he omitted Martial and Lacazette here:
“They were good against Germany (in November 2017), but that was only one match. That aside, there were a bit less (good). It is a total analysis regarding what they could have done in certain situations, and in terms of what role they might have had in the squad. I consider Giroud, Griezmann, Fékir and Mbappé as central attackers. Kylian and Antoine can play in other positions. Kylian is more central, that is where he is best.”
So from the sound of things, his competition was more central than out wide and unfortunately for him, Griezmann, Fekir and Mbappe had better seasons and Giroud provides something different. All four have played more regularly over the last few months too.