Erik Lamela pulled a goal back for Spurs but the Reds were not to be denied a fifth consecutive Premier League victory.
Souness said afterwards Spurs are "standing still" in the Premier League while he thinks Liverpool have their best side since they won the title in 1990.
Vorm failed to control the rebound after Mane's cross from the right was turned onto the post by Jan Vertonghen, and Firmino collected himself to poke it over the goal line for his second league goal of the season and second in as many games.
While Kane collected the Golden Boot in Russian Federation, the six goals came in his first three games and that was followed by a three-match barren run. "We were that good it was hard for Tottenham". The result is most important and the results ideal. Because we came here and tried to do it, you need a really outstanding performance - and that was what the boys delivered today.
But Tottenham were careless from start to finish and they paid the price in the 39th minute.
"I would not give it [last year's match] a second thought if you [the media] would not remind me of it", Klopp said after the match.
"Now we have to prove that and do it again and again". "It was like we thought, "OK, it is a nice afternoon in Watford, Elton John is in the stands". "Hopefully we can go there and put on a big performance and come back with the win".
Although Jurgen Klopp will be curious as to why his side couldn't convert more of the many chances they created, the closing five minutes of today's game very almost undone what was a landmark win for Klopp's side. A draw was fantastic for us - maybe we did not deserve to win.