With Liverpool’s lead over AFC Bournemouth still a slender one midway through the second half, the right-back served up a stunning pass over the visiting defence from the touchline for the Egyptian to nod in his 40th goal of the season.
Salah’s header – looped over Asmir Begovic on an angle – was exquisite but the ball from Alexander-Arnold was its equal in quality.
The No.66 modestly diverted the credit for his part in the strike but in doing so shed light on how the Reds’ attackers make life easier for those trying to feed them.
“It’s a big part of our game, our front three running in behind,” Alexander-Arnold told BT Sport after a 3-0 win in which Sadio Mane and Roberto Firmino also scored.