After the Barcelona legend netted a treble in the South Americans’ 3-0 victory over Algeria, the Liverpool midfielder reflected on the standards set by his skipper.
Mac Allister said Messi operates on a completely different level, with instincts and abilities that cannot be taught.
"I enjoy being with Leo a lot, there won't be another one like him," Mac Allister told reporters.
"It's very different to see it next to him, the things he does are not normal. From my side, I simply take advantage of it, he is very important for us to win, and from another side, the admiration.
“It's very difficult to learn from what he does, because you have it in your head but you can never do it that way. What I learn from him are the values and the humility he has being who he is."