But his goal at St Mary's on the weekend took his overall season tally to 20 and, with the Brazilian worldwide having increased his scoring output every season under Klopp's management, the signs point to him continuing to become one of Europe's most complete forwards.
The two-goal lead was harsh on Southampton going into half time, but it nearly got worse in the opening stages of the second half when Mane's acrobatic effort was blocked and fell at the feet of Salah, although this time the prolific winger scooped his finish over the crossbar.
Liverpool's signing of Van Dijk was a huge high point, as the team's defence was causing Jurgen Klopp and their fans all sorts of nightmares, so when the Dutchman scored the victor in the Merseyside derby in the FA Cup third round he was an instant hero. Sadio Mané has scored six goals in his last five Premier League appearances at St. Mary's Stadium but none of these were as a Liverpool player!
Firmino also contradicts any assumption that he is a South American who might not relish the rough and tumble of an English winter.
"Last season, little by little, Jack was playing more in the second part of the season and that is more or less the same now".
Southampton boss Mauricio Pellegrino is delighted with the form of Jack Stephens. But the turn of the year saw his side pick up results that keep have taken some of the heat off, for the time being at least. With draws against Watford, Spurs and Brighton and a win over West Brom in the league as well as two FA Cup wins by a 1-0 scoreline against Fulham and Watford, Saints will have confidence going into this game.
Can the Saints continue their revival by winning a vital three points?
On his club's hopes of avoiding relegation, he added: "It's emotional for a lot of people".