The glaring attention that has fallen upon one elite Liverpool great switched to another on Anfield's latest frustrating night.
The Egyptian forward has been under scrutiny for his struggles this season - and was relegated to the bench for the second successive Premier League game as the Black Cats came to town on Wednesday.
But it was leader Virgil van Dijk, a peerless defensive foundation as Liverpool have secured the complete set of major prizes, whose struggles took center stage during the 1-1 draw.
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 offering extensions to a seasoned pair much nearer to the end of their careers than the start.
Truly, it was a reason for joy - but now there is no denying the harsh truth that levels have fallen concerningly for both.
Liverpool have been vulnerable in defence ever since boss Arne Slot and the club's scouting department undertook a £450m summer overhaul that has not yet shown anything like its worth.
Concurrently, Van Dijk has started to shed the aura of invulnerability he has held since his £75m move from Southampton in January 2018.
Van Dijk has not been helped by center-back colleague Ibrahima Konate's loss of form, along with Milos Kerkez failing to settle at left-back. But the great Dutchman has also struggled badly, 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 well-earned lead, Van Dijk giving the ball away before backing away and averting his body on a 25-yard shot that deflected off him and floated out of the reach of goalkeeper Alisson.
For a defender of such proven caliber, Van Dijk has an peculiar tendency of turning away on the ball, sometimes to Liverpool's cost.
Ill fortune at the conclusion, yes, but it was a situation Van Dijk courted with his atypical failure to take charge, Sunderland's Talbi taking advantage.
"Van Dijk gives the ball away and then he just drops off. 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 couldn't make a mistake. 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 glittering Liverpool career.
He has, though, looked a faded version of his usual imperious self this season, with the poest ball recovery rate 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 missing here. No-one was inspiring a team that once again looked bewildered to seize the initiative by the throat.
Van Dijk's subpar showing, which ended with him being used as the emergency option of acting as an last-ditch attacker, was representative of a deeply underwhelming Liverpool performance - which made Sunday's win at West Ham seem like the anomaly rather than the standard.
Slot persisted with the side that stopped 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 never came, with £125m Alexander Isak also anonymous after opening his account 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 spared embarrassment 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 rounded keeper Alisson.
Slot and his struggling title-holders ultimately had to accept the point 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 slow, ponderous and short on invention. Even the traditional late rally after the equaliser carried minimal threat. Displays like this are the reason their title defence has fallen apart.
But huge credit 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 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 telling of the manner in which they have embraced 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 time for reflection.
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