The intense spotlight that has been trained on one world-class Liverpool great shifted to another on Anfield's fresh frustrating night.
The Egyptian forward has come under fire 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 skipper Virgil van Dijk, a unmatched defensive foundation as Liverpool have collected the full collection of major prizes, whose poor form came under the microscope during the draw.
Van Dijk, 34, and Salah, 33, both inked lucrative new two-year deals in the summer, with not one Liverpool concern voiced at the notion of offering extensions to a experienced stars much approaching the end of their careers than the start.
Truly, it was a moment of optimism - but now there is no escaping the stark fact that levels have fallen concerningly for both.
Liverpool have been exposed in defence ever since manager Arne Slot and the club's recruitment team undertook a £450m summer refit that has still to demonstrate anything like its worth.
Concurrently, 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 not been helped by defensive partner Ibrahima Konate's collapse in form, along with Milos Kerkez struggling to adapt at left-back. But the renowned star has also had significant difficulties, as highlighted by his desperate handball that gave away a penalty in the heavyweight Champions League loss to PSV Eindhoven at Anfield.
It was encapsulated in the 67th minute on Wednesday when Chemsdine Talbi gave Sunderland a deserved lead, Van Dijk losing possession before retreating and turning away on a 25-yard shot that hit him and looped out of the reach of goalkeeper Alisson.
For a defender of such undoubted greatness, Van Dijk has an peculiar tendency of shying away on the ball, sometimes to Liverpool's disadvantage.
Ill fortune at the conclusion, yes, but it was a situation Van Dijk invited with his atypical failure to take charge, Sunderland's Talbi seizing the moment.
"Van Dijk loses the ball 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 imperious, but right now he's slipping up and hesitating."
As with Salah, a player of Van Dijk's stature 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 shadow of his usual imperious self this season, with the worst recoveries 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 packed with experience, it was lacking here. No-one was motivating a team that once again looked lost to grab the game by the initiative.
Van Dijk's poor display, which ended with him being used as the desperate measure of acting as an makeshift forward, was symptomatic of a deeply underwhelming Liverpool performance - which made Sunday's win at West Ham seem like the outlier 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 was introduced at the start of the second half as the Kop pinned hopes on him for inspiration. It was not forthcoming, with £125m Alexander Isak also ineffective after opening his account 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 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 struggling title-holders 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 lethargic, ponderous and short on invention. Even the typical final push after the equaliser carried minimal threat. Displays like this are the reason their title defence has fallen apart.
But full acknowledgment for the Reds' struggles on Wednesday must be given to Sunderland, who are being rewarded for a summer of serious ambition in the transfer market, coupled with the excellent coaching of Regis le Bris.
The Black Cats were adventurous, self-believing and dangerous.
Sunderland are now sixth in the Premier League with 23 points. It is symptomatic 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 time for reflection.
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