The on-loan Barcelona winger has recovered from a hamstring injury.
"Gerard is such a positive young man and you can see he has missed being at Everton so much," Martinez told evertontv ahead of Deulofeu's possible return to action at Tottenham this weekend.
"It is an incredible reflection of what he is. When he arrived in the summer, he was a young man coming from Spain with an enormous talent. Now what we have is a young man coming from Spain with an enormous talent - and with an incredible desire to play for Everton.
"I am sure the fans will see the player they have seen growing and also a player with an incredible determination to be as good as he can be, and that can only be good for Everton."
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