The glaring focus that has fallen upon one global Liverpool legend shifted to another on Anfield's most recent frustrating night.
The Egyptian forward has come under fire for his poor form this campaign - and was placed on the bench for the second straight Premier League game as the Black Cats visited on Wednesday.
But it was skipper Virgil van Dijk, a unmatched defensive rock as Liverpool have secured the complete set of major prizes, whose dip in performance became the focus during the 1-1 draw.
Van Dijk, 34, and Salah, 33, both agreed to lucrative new two-year deals in the summer, with not one Liverpool concern voiced at the notion of handing contracts to a veteran duo much closer to the end of their careers than the start.
Truly, it was a cause of celebration - but now there is no denying the stark fact that levels have fallen alarmingly for both.
Liverpool have been exposed in defence ever since boss Arne Slot and the club's recruitment team embarked on a £450m summer refit that has not yet shown anything like a good return.
Concurrently, 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 not been helped by defensive partner Ibrahima Konate's loss of form, along with Milos Kerkez not finding his feet at left-back. But the esteemed defender has also fought his own battles, as proved by his desperate handball that resulted in a penalty in the heavyweight Champions League loss to PSV Eindhoven at Anfield.
It was captured in the 67th minute on Wednesday when Chemsdine Talbi gave Sunderland a well-earned lead, Van Dijk losing possession before backing away and turning away on a 25-yard shot that struck him and drifted out of the reach of goalkeeper Alisson.
For a defender of such proven caliber, Van Dijk has an unusual habit of shying away on the ball, sometimes to Liverpool's disadvantage.
Ill fortune at the conclusion, yes, but it was a situation Van Dijk provoked with his uncharacteristic failure to take charge, Sunderland's Talbi taking advantage.
"Van Dijk gives the ball away 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 commanding, but right now he's erring and hesitating."
As with Salah, a player of Van Dijk's pedigree must not be dismissed after securing two Premier Leagues, the Champions League, the FA Cup and two EFL Cups in a illustrious Liverpool career.
He has, though, looked a pale imitation of his usual dominant persona this season, with the poest ball recovery rate per game during his Liverpool career, while defensive actions 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 missing here. No-one was motivating a team that once again looked clueless to seize the initiative by the throat.
Van Dijk's difficult night, which ended with him being used as the last resort of acting as an emergency striker, was symptomatic of a distinctly poor Liverpool performance - which made Sunday's win at West Ham seem like the exception rather than the rule.
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 emerged at the start of the second half as the Kop pinned hopes on him for inspiration. It failed to materialize, with £125m Alexander Isak also ineffective after getting off the mark with his first league goal for Liverpool on Sunday.
Slot would have been under increased scrutiny 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.
Late drama 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 struggling title-holders ultimately had to settle for a draw 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 lethargic, ponderous and short on invention. Even the typical final push after the equaliser carried little conviction. Showings like this are the reason their attempt to retain the title has collapsed.
But significant praise 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 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 adapted to 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 back to the drawing board.
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