The glaring spotlight that has centered around one global Liverpool legend turned to another on Anfield's fresh disappointing night.
The Egyptian forward has come under fire for his subpar performances this season - and was consigned to the sidelines for the consecutive Premier League game as the Black Cats visited on Wednesday.
But it was captain Virgil van Dijk, a unmatched defensive rock as Liverpool have collected the array of major trophies, whose struggles became the focus during the 1-1 draw.
Van Dijk, 34, and Salah, 33, both inked lucrative new two-year deals in the summer, with scarcely a Liverpool question asked at the notion of securing the futures to a seasoned pair much nearer to the end of their careers than the start.
In fact, it was a reason for joy - but now there is no escaping the stark fact that standards have dropped alarmingly for both.
Liverpool have been vulnerable in defence ever since head coach Arne Slot and the club's transfer committee undertook a £450m summer refit that has yet to prove anything like value for money.
At the same time, Van Dijk has started to lose the aura of invulnerability he has possessed since his £75m transfer from Southampton in January 2018.
Van Dijk has received little support by defensive partner Ibrahima Konate's collapse in form, along with Milos Kerkez failing to settle at left-back. But the great Dutchman has also fought his own battles, as highlighted by his desperate handball that resulted in a penalty in the heavy Champions League loss to PSV Eindhoven at Anfield.
It was captured in the 67th minute on Wednesday when Chemsdine Talbi gave Sunderland a deserved lead, Van Dijk surrendering the ball before retreating 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 unquestionable quality, Van Dijk has an peculiar tendency of turning away on the ball, sometimes to Liverpool's detriment.
Bad luck at the conclusion, yes, but it was a situation Van Dijk provoked with his unusual failure to act decisively, 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 dominant, but right now he's making mistakes and doubting 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 illustrious Liverpool career.
He has, though, looked a pale imitation of his usual dominant persona this season, with the worst recoveries 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 sole responsibility alone in a Liverpool team packed with experience, it was missing here. No-one was motivating a team that once again looked bewildered to seize the initiative by the scruff of the neck.
Van Dijk's poor display, which ended with him being used as the desperate measure of acting as an emergency striker, was indicative of a distinctly poor Liverpool performance - which made Sunday's win at West Ham seem like the outlier rather than the norm.
Slot kept faith with the side that ended a run of nine losses in 12 games at London Stadium, Salah once more observing from the sidelines.
The Egyptian came on at the start of the second half as the Kop turned to him for inspiration. It failed to materialize, with £125m Alexander Isak also anonymous after getting off the mark 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 taken a deflection off Nordi Mukiele to set up what Liverpool hoped would be a dramatic ending.
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 underperforming defending champions 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, unimaginative and lacking in ideas. Even the typical final push after the equaliser carried minimal threat. Showings 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 rewarded for a summer of clear intent in the transfer market, coupled with the fine work of Regis le Bris.
The Black Cats were adventurous, self-believing 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 grown into 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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