Speaking ahead of Wednesday night’s first-leg clash at the Montjuic, Martinez said: "Well, first of all, I’m not going to get into that. For me, Leo has no comparison, because he is, was, and will be the best player of all time. So I won’t make that comparison. I can only say that Lamine Yamal is an important player, we’ve all seen it, we all know it. At his young age, he’s doing a tremendous job, he’s already won important titles with his national team, so he deserves respect.”