The former Chelsea forward has been in impressive form for the Latics this season and has been called up for Argentina's game wiht Saudi Arabia on November 14.
“Just to be called up is an incredible achievement,” said Martinez. “You look on the right handside and you see Lionel Messi, you look to the left and you see Kun Aguero and you’ve got Tevez who hasn’t been called up and Higuain. They are world class players who are winning trophies.
“It’s been a fascinating journey to see his transformation from a young boy with great potential to a proper footballer who can achieve a lot in the game. He was very, very proud.”
The call up is likely to be a further boost to the confidence of Di Santo who at 23 years of age represents a terrific prospect for the Latics.