The glaring spotlight that has been trained on one world-class Liverpool great turned to another on Anfield's most recent desperate night.
Mohamed Salah has faced examination for his struggles this campaign - and was placed on the substitutes' bench for the second successive Premier League game as Sunderland arrived on Wednesday.
But it was skipper Virgil van Dijk, a peerless defensive rock as Liverpool have secured the complete set of top honors, whose poor form came under the microscope during the 1-1 draw.
Van Dijk, 34, and Salah, 33, both inked lucrative new two-year deals in the summer, with scarcely a Liverpool eyebrow raised at the prospect of offering extensions to a veteran duo much nearer to the end of their careers than the start.
In fact, it was a reason for joy - but now there is no avoiding the brutal reality that levels have fallen worryingly for both.
Liverpool have been susceptible in defence ever since head coach Arne Slot and the club's recruitment team embarked on a £450m summer overhaul that has still to demonstrate anything like a good return.
Simultaneously, Van Dijk has started to forfeit the air of invincibility he has possessed since his £75m switch from Southampton in January 2018.
Van Dijk has received little support by fellow defender 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 highlighted by his desperate handball that gave away a penalty in the heavy 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 losing possession before backing away and turning his back 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 disadvantage.
Misfortune at the finale, yes, but it was a situation Van Dijk provoked with his atypical failure to make a decisive move, Sunderland's Talbi taking advantage.
"Van Dijk gives the ball away and then he just backs off. It's the incorrect choice. 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 slipping up and second-guessing himself."
As with Salah, a player of Van Dijk's stature must not be written off 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 pale imitation of his usual imperious self this season, with the lowest recovery numbers per game during his Liverpool career, while tackles and interceptions are also down on last season.
And, while leadership should not be Van Dijk's sole responsibility alone in a Liverpool team packed with experience, it was missing here. No-one was inspiring a team that once again looked clueless to take control by the initiative.
Van Dijk's subpar showing, which ended with him being used as the desperate measure of acting as an last-ditch attacker, was indicative of a deeply underwhelming Liverpool performance - which made Sunday's win at West Ham seem like the outlier rather than the norm.
Slot kept faith with the side that stopped a run of nine losses in 12 games at London Stadium, Salah once more watching from the sidelines.
The Egyptian came on at the start of the second half as the Kop pinned hopes on him for inspiration. It never came, with £125m Alexander Isak also quiet after scoring his first 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 thrilling finale.
A late scare came - but at the other end. Liverpool were only spared embarrassment in stoppage time when Federico Chiesa's superb tracking back allowed him to turn Sunderland substitute Wilson Isidor's shot off the line after he had beaten keeper Alisson.
Slot and his underperforming defending champions ultimately had to settle for a draw knowing it could have been worse, with Alisson fortunate 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 devoid of creativity. Even the traditional late rally after the equaliser carried minimal threat. Performances like this are the reason their attempt to retain the title has collapsed.
But significant praise for the Reds' struggles on Wednesday must be given to Sunderland, who are being reaping the benefits for a summer of serious ambition in the transfer market, coupled with the excellent coaching of Regis le Bris.
The Black Cats were positive, assured and threatening.
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 disappointed they left Anfield without adding two more to their tally.
For Slot and Liverpool, it is time for reflection.
Lena Hartwell is a former statistician and lottery enthusiast who now writes about probability and smart play strategies.