The unforgiving attention that has centered around one global Liverpool icon shifted to another on Anfield's latest frustrating night.
Mohamed Salah has come under fire for his poor form this campaign - and was placed on the bench for the second straight Premier League game as the Black Cats visited on Wednesday.
But it was skipper Virgil van Dijk, a peerless defensive bedrock as Liverpool have swept up the full collection of top honors, whose poor form came under the microscope during the 1-1 draw.
Van Dijk, 34, and Salah, 33, both inked high-value two-year deals in the summer, with barely a Liverpool concern voiced at the notion of handing contracts to a experienced stars much nearer to the end of their careers than the start.
Indeed, it was a moment of optimism - but now there is no denying 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 recruitment team embarked on a £450m summer overhaul that has not yet shown anything like a good return.
Simultaneously, Van Dijk has started to shed the air of invincibility he has possessed since his £75m switch from Southampton in January 2018.
Van Dijk has faced additional challenges by defensive partner Ibrahima Konate's collapse in form, along with Milos Kerkez struggling to adapt at left-back. But the great Dutchman has also had significant difficulties, as proved by his panic-stricken handball that gave away a penalty in the heavy Champions League loss to PSV Eindhoven at Anfield.
It was captured in the 67th minute on Wednesday when Chemsdine Talbi gave Sunderland a merited lead, Van Dijk surrendering the ball before standing off and turning away on a 25-yard shot that deflected off him and looped out of the reach of goalkeeper Alisson.
For a defender of such proven caliber, Van Dijk has an peculiar tendency of shying away on the ball, sometimes to Liverpool's cost.
Bad luck at the conclusion, yes, but it was a situation Van Dijk courted with his uncharacteristic failure to act decisively, Sunderland's Talbi taking advantage.
"Van Dijk surrenders possession and then he just drops off. 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 faultless. Every game he was imperious, but right now he's making mistakes and doubting himself."
As with Salah, a player of Van Dijk's caliber must not be dismissed after winning two Premier Leagues, the Champions League, the FA Cup and two EFL Cups in a illustrious Liverpool career.
He has, though, looked a faded version of his usual dominant persona 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 sole responsibility alone in a Liverpool team brimming with experience, it was absent here. No-one was motivating a team that once again looked lost to take control by the scruff of the neck.
Van Dijk's poor display, which ended with him being used as the emergency option of acting as an emergency striker, was indicative of a horribly mediocre Liverpool performance - which made Sunday's win at West Ham seem like the exception rather than the norm.
Slot stayed with the side that halted a run of nine losses in 12 games at London Stadium, Salah once more watching from the sidelines.
The Egyptian emerged at the start of the second half as the Kop looked to him for inspiration. It never came, 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 greater pressure had Florian Wirtz's 81st-minute shot not deflected in off Nordi Mukiele to set up what Liverpool hoped would be a dramatic ending.
Late drama came - but at the other end. Liverpool were only avoided defeat in stoppage time when Federico Chiesa's excellent defensive sprint allowed him to turn Sunderland substitute Wilson Isidor's shot off the line after he had dribbled past keeper Alisson.
Slot and his fading champions ultimately had to take a point 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 sluggish, labored and devoid of creativity. Even the traditional late rally after the equaliser carried little conviction. Displays like this are the reason their title defence has crumbled.
But full acknowledgment for the Reds' struggles on Wednesday must be given to Sunderland, who are being rewarded for a summer of serious ambition in the transfer market, coupled with the superb management of Regis le Bris.
The Black Cats were positive, assured and dangerous.
Sunderland are now sixth in the Premier League with 23 points. It is indicative of the manner in which they have embraced life in the Premier League that they will be frustrated they left Anfield without adding two more to their tally.
For Slot and Liverpool, it is back to the drawing board.
Tech journalist and innovation analyst with over a decade of experience covering cutting-edge developments in AI and consumer electronics.