At that point Spurs were still one goal up. Doubling that advantage would surely have led to a famous victory although, in fairness, they should not point the finger at Son, who along with goalkeeper Paulo Gazzaniga and captain Harry Kane was their best performer, but instead ask why some of the others did not step up when the pressure become so intense.
The frustration of the Spurs fans will focus on Serge Aurier who — again — rashly conceded the crucial penalty as Liverpool finally earned their reward. It means they have 28 points – 16 more than Spurs – and are only the fourth team in Premier League history to reach that mark at this stage.
There was a great line from Liverpool manager Jurgen Klopp as he summed up his reaction to the shock of Kane scoring after just 47 seconds. "Early goal makes one thing clear," Klopp said. "Game on."
Liverpool claimed a penalty in the 52nd minute, with Danny Rose challenging Firmino to reach Fabinho's pass into the area. It ran to Henderson who guided a cross-shot past Gazzaniga and into the net.
There was something inevitable about the sense that they would strike again and it came as Sadio Mane was kicked by Aurier and the penalty was given in the 75th.
"It was a super game," Klopp said. "That's how football should look."