The Manchester United defender has been a revelation since arriving in the summer from Ajax and quickly endeared himself to the club's supporters with his whole-hearted approach and excellent passing range.
It comes as no great surprise that he is in coach Lionel Scaloni's 26-man group for the big tournament in Qatar, and he will link up with his international colleagues after Sunday's Premier League contest at Fulham.
Martinez came on as a late substitute in the 4-2 win over Aston Villa in the Carabao Cup on Thursday night and will be in contention to return to the starting line-up at Craven Cottage, as the Reds seek to end this part of the season on a high in the capital.