The intense spotlight that has centered around one global Liverpool great shifted to another on Anfield's fresh desperate night.
The Egyptian forward has come under fire for his subpar performances this campaign - and was relegated to the sidelines for the second successive Premier League game as the Black Cats came to town on Wednesday.
But it was captain Virgil van Dijk, a exceptional defensive foundation as Liverpool have swept up the complete set of major trophies, whose struggles came under the microscope during the stalemate.
Van Dijk, 34, and Salah, 33, both inked lucrative new two-year deals in the summer, with scarcely a Liverpool eyebrow raised at the idea of offering extensions to a veteran duo much nearer to the end of their careers than the start.
In fact, it was a cause of celebration - but now there is no avoiding the stark fact that standards have dropped worryingly for both.
Liverpool have been vulnerable in defence ever since boss Arne Slot and the club's recruitment team undertook a £450m summer rebuild that has yet to prove anything like value for money.
At the same time, Van Dijk has started to lose the sense of being untouchable he has carried since his £75m switch from Southampton in January 2018.
Van Dijk has not been helped by center-back colleague Ibrahima Konate's dramatic dip, along with Milos Kerkez not finding his feet at left-back. But the esteemed defender has also struggled badly, as proved 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 losing possession before retreating and averting his body on a 25-yard shot that deflected off 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.
Bad luck at the conclusion, yes, but it was a situation Van Dijk provoked with his unusual failure to take charge, Sunderland's Talbi capitalising.
"Van Dijk gives the ball away and then he just backs off. It's the wrong decision. 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 commanding, but right now he's erring and second-guessing himself."
As with Salah, a player of Van Dijk's stature must not be dismissed 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 shadow of his usual commanding presence this season, with the poest ball recovery rate 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 brimming with experience, it was absent here. No-one was inspiring a team that once again looked clueless 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 makeshift forward, was symptomatic of a deeply underwhelming Liverpool performance - which made Sunday's win at West Ham seem like the anomaly rather than the norm.
Slot kept faith with the side that halted 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 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 even more 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 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 beaten keeper Alisson.
Slot and his fading champions ultimately had to accept the 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 slow, ponderous and lacking in ideas. Even the traditional late rally after the equaliser carried scant belief. Showings like this are the reason their title defence has crumbled.
But huge credit for the Reds' struggles on Wednesday must be given to Sunderland, who are being reaping the benefits for a summer of clear intent in the transfer market, coupled with the superb management of Regis le Bris.
The Black Cats were adventurous, assured 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 embraced 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 time for reflection.
Lena Visser is techjournalist met focus op startups en digitale transformatie in Eindhoven.