Back in the 2011/12 Premier League season, it was Manchester City who found themselves at the summit of the league table after 20 games, with their tally of 48 points giving them a lead of three points over United and Tottenham Hotspur.
We only can think now of the match on Tuesday [against Fulham] and know that the difference between Liverpool and us was not like today's result.
And the former forward holds back his head in anguish at Firmino's second goal.
Liverpool have extended their unbeaten record in the English Premier League after humiliating Arsenal 5-1 at Anfiled.
Mane made it 3-1 on 32 minutes when Salah cushioned a cross perfectly into the Senegalese's path to side-foot high into the net.
All three of Liverpool's frontline deserve honourable mentions, but Firmino was the standout for his link-up play, clever off-the-ball movement and three goals - the second of which being brilliant.
The form of Lucas Torreira had me anxious in that respect but Liverpool's no.5, Gini Wijnaldum, absolutely bossed the Uruguayan all night.
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The 29-year-old had barely played at the back end of last season, despite being fit after a hamstring injury, as Pochettino appeared to freeze him out.
Arsenal was apparently in ruins when Emery took charge, and he has done a decent job to keep them in contention for a top four spot.
But the response from the capacity Anfield crowd suggests it will be hard for the manager to temper expectations among them of a first Liverpool title in 29 years.
"Now (we have) to check what we have been doing wrong, try to improve those areas and start winning games as fast as possible. So far the gesture of the season". Later, two stonewall penalty kicks saw the Reds add more to their total.
After Salah was tackled, an attempted clearance from Stephan Lichtsteiner hit teammate Shkodran Mustafi and ricocheted into the path of Firmino, who tapped in without looking at the ball.
And Liverpool were given the chance to extend their lead just before half-time when Salah tumbled under pressure from Sokratis in the box. During those game weeks, Liverpool have defeated Newcastle 4-0, Wolves 2-0, Bournemouth 4-0 and Brighton 1-0.
They've had to get used to Klopp and I think they didn't have the personnel to follow things through in the first two years.
"Those are the kind of things that stand you in good stead with your team-mates".