On paper, Tuesday's Champions League showdown between Liverpool and Paris Saint-Germain had the potential to be something special.
He simply has not looked as sharp as he did past year and the game against PSG may have brought an answer as to why.
PSG were good challengers as they dissolved a 2-0 lead built by Daniel Sturridge and James Milner with their own combination of goals from Thomas Meunier and Kylian Mbappe.
We were in trouble in the first half, but we showed character and scored. "We are suffering a little bit but that's not an excuse", said Tottenham manager Mauricio Pochettino.
England worldwide Sturridge made up for lost time, breaking the deadlock in the 30th minute when he met Andrew Robertson's pin-point cross with a clinical close-range header.
And it was two for Liverpool with 36 minutes gone when, after Juan Bernat's rash challenge on Giroginio Wijnaldum, Milner fired a low penalty beyond Areola to put Liverpool in control.
"But in a match like this, where the level is high, you always have to be focused, because the other team can score at any given moment". He was dispossessed five times by Liverpool defenders.
Silva was in the right place to clear as Alexander-Arnold crossed, and with 20 minutes remaining Klopp made a change, with Firmino coming on in place of scorer Sturridge. UEFA have introduced a handful of earlier kick-offs in every Champions League midweek this season, and it was still light at the Camp Nou as Barcelona kicked off against PSV Eindhoven in Group B.
Did Liverpool prove they can play with Europe's elite against PSG?
But, Roberto Firmino of Brazil came off the bench and scored the victor for Liverpool, moments before the final whistle.