Martinez sung the praises of Barkley after victory over Arsenal.
"For the first time he had the highest passing percentage in midfield, he made more passes than any other midfielders.
"That was impressive for someone so young in the middle of that war we had with their midfield.
"I wasn't sure with his calf injury against Fulham whether Ross could do 90 minutes, especially after three games in a week. That was a concern. But even at the end he looked like he could go on for another half an hour, he was so dominant.
"To have a player aged 20 showing all those signs is remarkable. For him to come up as the outstanding figure (from the game) reflects how far he has come.
"It is a great balance between his natural talent and rational approach."
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