The intense focus that has been trained on one elite Liverpool legend switched to another on Anfield's most recent disappointing night.
The Egyptian forward has been under scrutiny for his poor form this campaign - and was placed on the substitutes' bench for the second straight Premier League game as Sunderland came to town on Wednesday.
But it was captain Virgil van Dijk, a peerless 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 signed new lucrative two-year deals in the summer, with not one Liverpool concern voiced at the idea of offering extensions to a veteran duo much closer to the end of their careers than the start.
Indeed, it was a cause of celebration - but now there is no denying the harsh truth that performance has dipped alarmingly for both.
Liverpool have been susceptible in defence ever since manager Arne Slot and the club's scouting department 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 held since his £75m transfer from Southampton in January 2018.
Van Dijk has faced additional challenges by fellow defender Ibrahima Konate's dramatic dip, along with Milos Kerkez failing to settle at left-back. But the renowned star has also had significant difficulties, as proved by his rash handball that resulted in 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 merited lead, Van Dijk giving the ball away before backing away and averting his body on a 25-yard shot that hit him and looped out of the reach of goalkeeper Alisson.
For a defender of such proven caliber, Van Dijk has an peculiar tendency of shying away on the ball, sometimes to Liverpool's disadvantage.
Bad luck at the end, yes, but it was a situation Van Dijk courted with his atypical failure to take charge, Sunderland's Talbi seizing the moment.
"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 imperious, but right now he's erring and doubting himself."
As with Salah, a player of Van Dijk's stature must not be dismissed after claiming 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 lowest recovery numbers per game during his Liverpool career, while defensive actions are also down on last season.
And, while leadership should not be Van Dijk's preserve alone in a Liverpool team brimming with experience, it was missing here. No-one was motivating a team that once again looked bewildered to seize the initiative by the initiative.
Van Dijk's subpar showing, which ended with him being used as the desperate measure 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 norm.
Slot stayed with the side that stopped 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 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 deflected in 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 excellent defensive sprint allowed him to turn Sunderland substitute Wilson Isidor's shot off the line after he had rounded keeper Alisson.
Slot and his underperforming defending champions ultimately had to settle for a draw 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 sluggish, ponderous and short on invention. Even the typical final push after the equaliser carried little conviction. Displays like this are the reason their title defence has collapsed.
But full acknowledgment 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 superb management of Regis le Bris.
The Black Cats were adventurous, self-believing and threatening.
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 frustrated they left Anfield without adding two more to their tally.
For Slot and Liverpool, it is back to the drawing board.
A digital strategist and tech writer with over a decade of experience covering emerging trends in the UK's online landscape.