He told the Sunday Sun: "He's still developing his game here. We like what we see, he's excellent in training and at the moment we feel he's in the best place for him.
"He hasn't got the minutes on the football pitch that he would like. But he's still a very young one, which you can forget.
"He's big and strong which makes many people forget that he's still actually only 19. The best place for his development is here."