Al Habsi was left on the bench for Wigan's win over Newcastle United as Martinez kept faith with the side that beat Everton in the FA Cup, meaning another start for Spanish youngster Joel.
But Al Habsi impressed Martinez with the way he played for Oman in a 2-2 draw against Australia in midweek, putting him in contention for a recall against Norwich City on Saturday.
"Ali was fantastic against Australia," Martinez said. "He made six incredible saves from Tim Cahill alone.
"I think that was the Australian tactic, looking for Cahill in the box. But Ali stood up to him well."
Martinez admits he will have to rely on his whole squad for the rest of the season as Wigan battle for Premier League survival and FA Cup glory.
"Every position is for grabs," he stated. "Remember we have at least 10 games in the next seven weeks, and every player is going to be needed.
"Obviously because of the FA Cup run, all of a sudden we have more players fighting for places in the team.
"I'm not going to make the decision on who plays - it will be football that makes the decision.
"That's why I feel the excitement around the place is so different, because everyone knows they absolutely have to be at their best. And at this stage of the season, the rewards are huge.
"Over the next seven weeks there will be moments that will be unique in a player's career."
Martinez may be forced into at least one change this weekend, with Antolin Alcaraz (groin) joining Callum McManaman (ankle) on the injured list.
"It's complicated with Antolin, because he has developed fatigue related to his injury," Martinez added.
"We perhaps should have given him more time."