But Liverpool has been lethal of late and Raphael Varane is out for the Reds.
That's a fine assist from Mohamed Salah.
They have booed their team off the pitch.
This article contains affiliate links.
Betis is unbeaten in five league matches, since a loss to Atlético at home last month.
Alexander-Arnold had already laid one on for Diogo Jota by then as had Naby Keita for Mohamed Salah, both low crosses from acres of space down the right to be tapped in at close range.