The unforgiving attention that has been trained on one global Liverpool great switched to another on Anfield's most recent frustrating night.
The Egyptian forward has faced examination for his struggles this campaign - and was placed on the sidelines for the second straight Premier League game as the Black Cats visited on Wednesday.
But it was captain Virgil van Dijk, a peerless defensive rock as Liverpool have collected the complete set of major prizes, whose struggles took center stage during the draw.
Van Dijk, 34, and Salah, 33, both inked lucrative new two-year deals in the summer, with barely a Liverpool eyebrow raised at the prospect of securing the futures to a veteran duo much approaching 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 standards have dropped alarmingly for both.
Liverpool have been vulnerable in defence ever since boss Arne Slot and the club's recruitment team undertook a £450m summer overhaul that has not yet shown anything like its worth.
At the same time, Van Dijk has started to forfeit the sense of being untouchable he has possessed since his £75m transfer from Southampton in January 2018.
Van Dijk has received little support by fellow defender Ibrahima Konate's loss of form, along with Milos Kerkez not finding his feet at left-back. But the great Dutchman has also fought his own battles, as demonstrated by his panic-stricken 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 giving the ball away before retreating and averting his body on a 25-yard shot that struck him and looped out of the reach of goalkeeper Alisson.
For a defender of such undoubted greatness, Van Dijk has an curious trait of shying away on the ball, sometimes to Liverpool's cost.
Misfortune at the finale, yes, but it was a situation Van Dijk courted with his uncharacteristic failure to make a decisive move, Sunderland's Talbi seizing the moment.
"Van Dijk gives the ball away 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 commanding, but right now he's slipping up and second-guessing himself."
As with Salah, a player of Van Dijk's caliber must not be written off 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 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 preserve alone in a Liverpool team full of experience, it was absent here. No-one was inspiring a team that once again looked lost to take control 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 distinctly poor Liverpool performance - which made Sunday's win at West Ham seem like the exception 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 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 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 increased scrutiny 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 avoided defeat 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 fading champions ultimately had to accept the 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 sluggish, ponderous and short on invention. Even the customary late surge after the equaliser carried minimal threat. Showings like this are the reason their attempt to retain the title has crumbled.
But significant praise 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 positive, self-believing and dangerous.
Sunderland are now sixth in the Premier League with 23 points. It is indicative 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 back to the drawing board.
A passionate sports journalist with over a decade of experience covering Italian football and local Turin events.