The right-back came on after around 65 minutes, replacing Conor Bradley, and boos rang out around the stadium as he entered the field.
Chants of "there's only one Conor Bradley" as well as a chant about former skipper Steven Gerrard, who famously stayed at Liverpool throughout his top-level career, also greeted Alexander-Arnold's introduction.
"That is not pleasant for him," Gary Neville said on Sky Sports co-commentary.
"I wasn't expecting Alexander-Arnold to be booed as much as he has."
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