The glaring attention that has fallen upon one global Liverpool legend turned to another on Anfield's fresh frustrating night.
The Egyptian forward has faced examination for his subpar performances this season - and was relegated to the sidelines for the second successive Premier League game as the Black Cats visited on Wednesday.
But it was leader Virgil van Dijk, a peerless defensive rock as Liverpool have swept up the complete set of top honors, whose struggles became the focus during the stalemate.
Van Dijk, 34, and Salah, 33, both signed lucrative new two-year deals in the summer, with not one Liverpool question asked at the notion of securing the futures to a veteran duo much closer to the end of their careers than the start.
Truly, it was a moment of optimism - but now there is no avoiding the stark fact that performance has dipped worryingly for both.
Liverpool have been susceptible in defence ever since head coach Arne Slot and the club's scouting department began a £450m summer overhaul that has still to demonstrate anything like a good return.
Simultaneously, Van Dijk has started to shed the aura of invulnerability he has carried since his £75m transfer from Southampton in January 2018.
Van Dijk has received little support by center-back colleague Ibrahima Konate's loss of form, along with Milos Kerkez struggling to adapt at left-back. But the esteemed defender has also had significant difficulties, as highlighted by his panic-stricken handball that conceded 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 deserved lead, Van Dijk losing possession before standing off and turning away on a 25-yard shot that deflected off 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 away on the ball, sometimes to Liverpool's cost.
Bad luck at the end, yes, but it was a situation Van Dijk provoked with his uncharacteristic failure to act decisively, Sunderland's Talbi capitalising.
"Van Dijk gives the ball away and then he just retreats. 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 imperious, but right now he's erring and doubting himself."
As with Salah, a player of Van Dijk's pedigree must not be written off after claiming two Premier Leagues, the Champions League, the FA Cup and two EFL Cups in a illustrious Liverpool career.
He has, though, looked a shadow 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 sole responsibility alone in a Liverpool team full of experience, it was absent here. No-one was rousing a team that once again looked bewildered to seize the initiative by the scruff of the neck.
Van Dijk's difficult night, which ended with him being used as the emergency option of acting as an makeshift forward, was indicative of a horribly mediocre Liverpool performance - which made Sunday's win at West Ham seem like the anomaly rather than the standard.
Slot stayed with the side that halted a run of nine losses in 12 games at London Stadium, Salah once more starting on the sidelines.
The Egyptian emerged at the start of the second half as the Kop looked to him for inspiration. It was not forthcoming, with £125m Alexander Isak also quiet 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 been turned in off Nordi Mukiele to set up what Liverpool hoped would be a grandstand finish.
Late drama came - but at the other end. Liverpool were only saved from humiliation 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 fading 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 short on invention. Even the customary late surge after the equaliser carried minimal threat. Displays like this are the reason their defense of their crown has crumbled.
But significant praise for the Reds' struggles on Wednesday must be given to Sunderland, who are being rewarded for a summer of notable ambition in the transfer market, coupled with the superb management 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 symptomatic 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.
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Elizabeth Petty
Elizabeth Petty
Elizabeth Petty