The 21-year-old made his debut in the competition last week, when the Reds were narrowly defeated 4-3 by Bayern Munich at the Allianz Arena, and he could be involved again this evening when Galatasaray visit Old Trafford.
But Pellistri insists his memories of merely watching such fixtures from the family home in Uruguay are still very fresh.
"I remember it a lot, coming quickly from school to see the games," he told us.
"Sometimes the games were at five o'clock or more or less in the hours between finishing school and getting home.