Wigan Athletic fans are set to get a rare look at Irish wonderkid James McCarthy in today's FA Cup tie with Hull City.
Highly-rated McCarthy, 19, has yet to make a league start for the Latics since moving from Hamilton in the summer.
Martinez said: "James was the golden boy at Hamilton and had never moved before. It's completely different when you move to the Premier League."
"It takes time to settle into your surroundings, but now James is getting frustrated and is desperate to play. He is ready. We have got a few players who are desperate to have an opportunity."