The 21-year-old defender was given his Reds debut by Klopp three years ago and he has not looked back, going on to establish himself for club and country.
Asked what he owes the German ahead of England's games with the Czech Republic and Bulgaria, Alexander-Arnold said: "Everything, really. Without him, who knows what would have happened.
"He's the one that's given me the most opportunities - more opportunities than I could even ask for.
"He's put a lot of trust and faith in me personally and I've tried to repay him every time he's done that."