While James Milner won't be in Russian Federation after retiring from worldwide football, the 32-year-old is being credited for Alexander-Arnold's rise - by the player himself.
And to round it all off, he was deservedly called up to England's World Cup squad this summer. It comes when Alexander-Arnold considers the disappointment of losing that Champions League final in Kiev to Real Madrid and the agony of being so close - in touching distance, literally - to the trophy.
What an incredible season it's been for Trent Alexander-Arnold. "Like me, he also came through really young and he's always there if I need to go to someone", Alexander-Arnold said of Milner. At Liverpool he is one of the players who have been really successful in their career, he knows how to win things and how it's done.
"And he's been an absolute hero for Liverpool this season too - he, with this Liverpool team, have given me memories I'll keep forever".
His last competitive match was the dramatic Champions League final defeat to Real Madrid - an experience he hopes has hardened him for the challenges ahead should he get a chance in Russian Federation.
Someone clearly flagged this tweet up to him, and the Liverpool youngster decided to make a small, but lovely gesture. I think even though it was a disappointing night as a team we've taken positives and hopefully it's made me a bit harder.