The intense focus that has been trained on one world-class Liverpool icon turned to another on Anfield's most recent disappointing night.
The Egyptian forward has been under scrutiny for his subpar performances this season - and was consigned to the sidelines for the second successive Premier League game as the Black Cats visited on Wednesday.
But it was captain Virgil van Dijk, a peerless defensive bedrock as Liverpool have collected the complete set of top honors, whose poor form became the focus during the draw.
Van Dijk, 34, and Salah, 33, both agreed to high-value two-year deals in the summer, with not one Liverpool question asked at the notion of handing contracts to a experienced stars much closer to the end of their careers than the start.
Indeed, it was a moment of optimism - but now there is no escaping the stark fact that standards have dropped concerningly for both.
Liverpool have been exposed in defence ever since head coach Arne Slot and the club's recruitment team embarked on a £450m summer overhaul that has not yet shown anything like value for money.
Simultaneously, Van Dijk has started to shed the aura of invulnerability he has possessed since his £75m move from Southampton in January 2018.
Van Dijk has received little support by center-back colleague Ibrahima Konate's dramatic dip, along with Milos Kerkez struggling to adapt at left-back. But the great Dutchman has also struggled badly, as highlighted by his desperate handball that gave away a penalty in the significant Champions League loss to PSV Eindhoven at Anfield.
It was exemplified in the 67th minute on Wednesday when Chemsdine Talbi gave Sunderland a well-earned lead, Van Dijk losing possession 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 unquestionable quality, Van Dijk has an peculiar tendency of turning his back on the ball, sometimes to Liverpool's cost.
Ill fortune at the conclusion, yes, but it was a situation Van Dijk provoked with his atypical failure to act decisively, Sunderland's Talbi seizing the moment.
"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 faultless. Every game he was dominant, but right now he's erring and doubting himself."
As with Salah, a player of Van Dijk's stature must not be written off after winning two Premier Leagues, the Champions League, the FA Cup and two EFL Cups in a glittering 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 key defensive stats are also down on last season.
And, while leadership should not be Van Dijk's exclusive domain alone in a Liverpool team brimming with experience, it was lacking here. No-one was inspiring a team that once again looked lost to seize the initiative by the scruff of the neck.
Van Dijk's subpar showing, which ended with him being used as the desperate measure of acting as an last-ditch attacker, was symptomatic 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 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 turned to him for inspiration. It was not forthcoming, with £125m Alexander Isak also anonymous 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 taken a deflection off Nordi Mukiele to set up what Liverpool hoped would be a grandstand finish.
A late scare came - but at the other end. Liverpool were only saved from humiliation in stoppage time when Federico Chiesa's outstanding recovery run 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 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 lethargic, unimaginative and lacking in ideas. Even the traditional late rally after the equaliser carried little conviction. Displays like this are the reason their attempt to retain the title has crumbled.
But huge credit 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 excellent coaching of Regis le Bris.
The Black Cats were positive, self-believing 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 disappointed they left Anfield without adding two more to their tally.
For Slot and Liverpool, it is a case of going back to basics.
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