The glaring attention that has been trained on one world-class Liverpool icon switched to another on Anfield's latest desperate night.
Mohamed Salah has faced examination for his subpar performances this season - and was relegated to the bench for the consecutive Premier League game as the Black Cats arrived on Wednesday.
But it was captain Virgil van Dijk, a peerless defensive bedrock as Liverpool have secured the array of major trophies, whose poor form came under the microscope 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 eyebrow raised at the idea of handing contracts to a experienced stars much approaching the end of their careers than the start.
Indeed, it was a reason for joy - but now there is no escaping the harsh truth that performance has dipped worryingly for both.
Liverpool have been exposed in defence ever since boss Arne Slot and the club's transfer committee began a £450m summer refit that has not yet shown anything like its worth.
At the same time, Van Dijk has started to shed the air of invincibility he has possessed since his £75m transfer from Southampton in January 2018.
Van Dijk has received little support by defensive partner Ibrahima Konate's collapse in form, along with Milos Kerkez not finding his feet at left-back. But the renowned star has also had significant difficulties, as proved by his panic-stricken 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 giving the ball away before retreating and turning his back on a 25-yard shot that deflected off him and floated out of the reach of goalkeeper Alisson.
For a defender of such undoubted greatness, Van Dijk has an peculiar tendency of turning his back on the ball, sometimes to Liverpool's cost.
Bad luck at the finale, yes, but it was a situation Van Dijk invited with his unusual failure to take charge, Sunderland's Talbi taking advantage.
"Van Dijk loses the ball 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 faultless. Every game he was imperious, but right now he's making mistakes and hesitating."
As with Salah, a player of Van Dijk's caliber must not be written off after winning 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 commanding presence 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 preserve alone in a Liverpool team full of experience, it was absent here. No-one was rousing a team that once again looked bewildered to grab the game by the initiative.
Van Dijk's poor display, which ended with him being used as the emergency option of acting as an emergency striker, was representative of a distinctly poor Liverpool performance - which made Sunday's win at West Ham seem like the outlier rather than the standard.
Slot stayed with the side that ended a run of nine losses in 12 games at London Stadium, Salah once more observing from the sidelines.
The Egyptian came on at the start of the second half as the Kop turned to him for inspiration. It failed to materialize, with £125m Alexander Isak also quiet after opening his account with his first league goal for Liverpool on Sunday.
Slot would have been under even more pressure had Florian Wirtz's 81st-minute shot not taken a deflection 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 avoided defeat 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 dribbled past keeper Alisson.
Slot and his underperforming defending champions ultimately had to take a point knowing it could have been worse, with Alisson lucky 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 scant belief. Displays like this are the reason their attempt to retain the title has collapsed.
But huge credit for the Reds' struggles on Wednesday must be given to Sunderland, who are being rewarded for a summer of clear intent in the transfer market, coupled with the fine work of Regis le Bris.
The Black Cats were positive, confident and dangerous.
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 frustrated they left Anfield without adding two more to their tally.
For Slot and Liverpool, it is a case of going back to basics.
Lena Voss is a tech enthusiast and freelance writer, passionate about demystifying complex innovations.