The youngster came on in the latter stages of the Reds' 2-1 Europa League victory over Austrian side LASK, becoming the 929th player to represent the club at senior level.
And when asked if manager Ole Gunnar Solskjaer's proactive approach to blooding young players had given him a lift, he replied:
“Of course. Especially Brandon, because we both play in defence. So when I saw him kicking on, it made me even hungrier. It made me think: why can't I do it? Obviously I got my opportunity today.”
Mengi admitted his cameo was
“the moment of my life so far”
, but the defender then stressed that he wants this to be merely the start of his journey, not a culmination.