The Manchester United striker has only scored once for his country in 25 appearances, and is still on the lookout for his first goal of the 2020-21 campaign after drawing another blank on the international stage.
Although Deschamps was disappointed that Martial was unable to convert any of his opportunities against Portugal, he acknowledged the fact the 24-year-old has only just returned to the France set-up and is still finding his feet.
“His finishing was lacking – it seemed a little bit clumsy,” the France boss told a post-match press conference.
“But sincerely, having watched the moments again, it came down to small margins.
“He is part of the group of players who have not been here for a long period of time, but he has changed during this period, on the pitch and off of it.”