The glaring focus that has been trained on one global Liverpool legend shifted to another on Anfield's most recent disappointing night.
Mohamed Salah has faced examination for his poor form this campaign - and was relegated to the sidelines for the second successive Premier League game as Sunderland came to town on Wednesday.
But it was skipper Virgil van Dijk, a peerless defensive bedrock as Liverpool have collected the complete set of major prizes, whose dip in performance took center stage during the 1-1 draw.
Van Dijk, 34, and Salah, 33, both inked new lucrative two-year deals in the summer, with barely a Liverpool concern voiced at the notion of offering extensions to a seasoned pair much approaching the end of their careers than the start.
In fact, it was a moment of optimism - but now there is no escaping the harsh truth that standards have dropped worryingly for both.
Liverpool have been vulnerable in defence ever since boss Arne Slot and the club's transfer committee began a £450m summer rebuild that has yet to prove anything like its worth.
At the same time, Van Dijk has started to shed the sense of being untouchable he has carried since his £75m switch from Southampton in January 2018.
Van Dijk has faced additional challenges by center-back colleague Ibrahima Konate's collapse in form, along with Milos Kerkez not finding his feet at left-back. But the esteemed defender has also had significant difficulties, as highlighted by his rash handball that gave away a penalty in the significant Champions League loss to PSV Eindhoven at Anfield.
It was encapsulated in the 67th minute on Wednesday when Chemsdine Talbi gave Sunderland a well-earned lead, Van Dijk surrendering the ball before backing away and averting his body on a 25-yard shot that struck him and drifted out of the reach of goalkeeper Alisson.
For a defender of such unquestionable quality, Van Dijk has an peculiar tendency of turning his back on the ball, sometimes to Liverpool's detriment.
Misfortune at the end, yes, but it was a situation Van Dijk courted with his uncharacteristic failure to take charge, Sunderland's Talbi seizing the moment.
"Van Dijk gives the ball away and then he just retreats. It's the mistake. He needs to go to the ball. Him not making the decision means that no one else knows what to do."
"Virgil Van Dijk last season was impeccable. Every game he was imperious, but right now he's making mistakes and hesitating."
As with Salah, a player of Van Dijk's pedigree must not be dismissed after securing two Premier Leagues, the Champions League, the FA Cup and two EFL Cups in a stellar Liverpool career.
He has, though, looked a faded version of his usual imperious self this season, with the lowest recovery numbers per game during his Liverpool career, while key defensive stats are also down on last season.
And, while leadership should not be Van Dijk's exclusive domain alone in a Liverpool team packed with experience, it was lacking here. No-one was rousing a team that once again looked lost to take control by the scruff of the neck.
Van Dijk's difficult night, which ended with him being used as the desperate measure of acting as an last-ditch attacker, was indicative of a distinctly poor Liverpool performance - which made Sunday's win at West Ham seem like the anomaly rather than the standard.
Slot persisted with the side that stopped a run of nine losses in 12 games at London Stadium, Salah once more observing from the sidelines.
The Egyptian was introduced at the start of the second half as the Kop pinned hopes on him for inspiration. It was not forthcoming, with £125m Alexander Isak also ineffective after getting off the mark with his first league goal for Liverpool on Sunday.
Slot would have been under increased scrutiny had Florian Wirtz's 81st-minute shot not taken a deflection off Nordi Mukiele to set up what Liverpool hoped would be a grandstand finish.
A late scare came - but at the other end. Liverpool were only saved from humiliation in stoppage time when Federico Chiesa's outstanding recovery run allowed him to turn Sunderland substitute Wilson Isidor's shot off the line after he had rounded keeper Alisson.
Slot and his underperforming defending champions ultimately had to settle for a draw knowing it could have been worse, with Alisson blessed to turn Trai Hume's shot onto the bar in the first half before Omar Alderete headed against the post after the interval.
Liverpool were slow, unimaginative and short on invention. Even the customary late surge after the equaliser carried minimal threat. Displays like this are the reason their attempt to retain the title has crumbled.
But full acknowledgment for the Reds' struggles on Wednesday must be given to Sunderland, who are being seeing the results for a summer of notable ambition in the transfer market, coupled with the excellent coaching of Regis le Bris.
The Black Cats were proactive, self-believing and a genuine threat.
Sunderland are now sixth in the Premier League with 23 points. It is indicative of the manner in which they have grown into life in the Premier League that they will be disappointed they left Anfield without adding two more to their tally.
For Slot and Liverpool, it is time for reflection.
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