The Toffees manager insists that you simply must fit Barkley into your side because his quality is too high to be left out.
The young midfielder endured a difficult campaign last year as an injury suffered before the start of the season curtailed his form and fitness as he and Everton struggled.
He has started this season on fire, though, with impressive performances for both club and country, and Martinez has praised him for his improvement in his awareness on the field, saying his understanding has gone to another level.
“His understanding has gone to another level and he is showing an incredible maturity to make those decisions,” he told evertonfc.com.
“Clearly, scoring goals is a big part of any attacking player but in Ross’ case I have been more pleased with his overall affect in that final third; his assists, movement and the way he attracts people out of position.”
You just need to fit Barkely into the team
The Catalan has also offered his views on where the best position to play Barkley is, with the debate still raging.
As of now, Barkley has been utilised as a number ten, and impressed in the role, but there has been talk that he lacks the skills to be effective in that role, with some suggesting that he should play deeper and others claiming he should be used as more of a forward.
Martinez, though, simply says that his best position is on the pitch, because a player of his quality needs to fit into the team.
“I think his best position is on the pitch. When you have got outstanding talent, you just need to fit it in the team,” he added.
"He is not just potential any more - he is a strong footballer with incredible quality. As with any footballer, it depends who you put around him and how you want to play. But clearly, the answer is to put him anywhere on the pitch.”