And, in first half stoppage time, Bernd Leno produced an nearly carbon copy of Alisson's earlier error by charging out in an attempt to stop a Virgil van Dijk header but misjudged the flight of the ball and was lucky to see it come back off the post.
"Today we controlled the game against a big club, against big players".
"'Spineless" seems to be one of the words of the week in the Premier League and under Arsene Wenger, the minute Arsenal went behind the fans would think "here we go again'".
"We have all that we need".
"There's a really good team chemistry here and a winning mentality".
Klopp acknowledged the courage in Emery's style when he said: "Arsenal did this before this year when they pretty much brought on all of their strikers".
Sead Kolasinac - 6 - Given the unenviable task of keeping a lid on Mohamed Salah, Kolasinac did well in the first half, keeping his opponent fairly quiet and restricted to glimpses of quality.
'It's good that we could change it at half-time. "We want to continue with him to give him the time to improve".
Lucas Torreira - 8 -Was the metronome of Arsenal's midfield, helping to control the game while also chipping in defensively.