The glaring focus that has centered around one global Liverpool icon switched to another on Anfield's latest desperate night.
Mohamed Salah has faced examination for his poor form this season - and was placed on the sidelines for the second straight Premier League game as the Black Cats visited on Wednesday.
But it was captain Virgil van Dijk, a peerless defensive bedrock as Liverpool have secured the array of major prizes, whose poor form 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 scarcely a Liverpool question asked at the notion of securing the futures to a experienced stars much nearer to the end of their careers than the start.
In fact, it was a moment of optimism - but now there is no escaping the stark fact that levels have fallen concerningly for both.
Liverpool have been vulnerable in defence ever since manager Arne Slot and the club's transfer committee undertook a £450m summer rebuild that has not yet shown anything like a good return.
At the same time, Van Dijk has started to forfeit the air of invincibility he has held since his £75m move from Southampton in January 2018.
Van Dijk has not been helped by defensive partner Ibrahima Konate's loss of form, along with Milos Kerkez not finding his feet at left-back. But the great Dutchman has also fought his own battles, as demonstrated by his desperate handball that resulted in a penalty in the heavy Champions League loss to PSV Eindhoven at Anfield.
It was exemplified in the 67th minute on Wednesday when Chemsdine Talbi gave Sunderland a merited lead, Van Dijk giving the ball away 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 proven caliber, Van Dijk has an unusual habit of turning his back on the ball, sometimes to Liverpool's cost.
Misfortune at the end, yes, but it was a situation Van Dijk invited with his unusual failure to make a decisive move, Sunderland's Talbi seizing the moment.
"Van Dijk loses the ball 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 couldn't make a mistake. Every game he was imperious, but right now he's slipping up and doubting himself."
As with Salah, a player of Van Dijk's caliber must not be dismissed after claiming 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 commanding presence this season, with the poest ball recovery rate 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 preserve alone in a Liverpool team full of experience, it was absent here. No-one was motivating a team that once again looked clueless to take control by the initiative.
Van Dijk's difficult night, which ended with him being used as the emergency option of acting as an emergency striker, was representative of a horribly mediocre Liverpool performance - which made Sunday's win at West Ham seem like the outlier rather than the rule.
Slot persisted with the side that stopped a run of nine losses in 12 games at London Stadium, Salah once more starting on the sidelines.
The Egyptian was introduced at the start of the second half as the Kop turned to 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 deflected in off Nordi Mukiele to set up what Liverpool hoped would be a dramatic ending.
Stoppage-time tension came - but at the other end. Liverpool were only saved from humiliation 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 rounded keeper Alisson.
Slot and his underperforming defending 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, unimaginative and lacking in ideas. Even the traditional late rally after the equaliser carried little conviction. Displays like this are the reason their defense of their crown 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 clear intent in the transfer market, coupled with the fine work of Regis le Bris.
The Black Cats were adventurous, assured and dangerous.
Sunderland are now sixth in the Premier League with 23 points. It is telling of the manner in which they have grown into life in the Premier League that they will be unhappy they left Anfield without adding two more to their tally.
For Slot and Liverpool, it is back to the drawing board.
A tech journalist and AI researcher with over a decade of experience covering emerging technologies and their impact on society.