Although Firmino was signed under previous manager Brendan Rodgers, the ex-Hoffenheim man has shown his best moments under Klopp's lead and he stressed the importance of the German manager.
Van Dijk has since made a steady start to life on Merseyside since becoming the most expensive defender in history but he recognises Sunday's game will be a test of his emotions and not just skill.
With Joe Gomez still struggling to recover from a knee injury, Klopp may turn to 19-year-old Trent Alexander-Arnold once again at right-back for the trip to St Mary's. I don't think so, but we will see. He's in good shape and looks fresh but he has been injured twice now.
But with several of the side's players enjoying some of their best-ever form - most notably James Ward-Prowse and Jack Stephens - the Saints could have their best chance of beating Liverpool since their meeting in the League Cup a year ago.
Van Dijk's move came six months after the Reds were forced into an embarrassing public climbdown regarding their interest in the player after being threatened with a tapping-up charge.
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Shah said that Kelly only became "fully aware" of the allegations this week. "I told him, I'm going to tell them the truth". McGahn declined to comment through a White House spokesman. "His clearance was never denied, and he resigned", Shah added.
"No one will talk about my performance in general".
"While we have chances, we will fight for titles of all the competitions that we dispute".
"Over the years when I was playing maybe we took it for granted getting to the knockout stages of the Champions League".
Both teams are in need of the points at different ends of the table. The Reds head into the weekend in third place, just a point above Chelsea in fourth and two ahead of Spurs in fifth.
Van Dijk is expecting a hot reception but insists it will not impact his performance for his new club. He is a very important player, a connecting player, a finisher, a fighter, a defender, the first defender - that is important.
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The forced selling that results from position covering could drag USA equity markets lower for a third straight day on Tuesday. On the social media forum Reddit, trading the XIV had proved so popular that it had earned its own forum called "tradeXIV".
"I don't think Southampton will say we have stolen him". I am going there with only one mindset and that is to win.
'We have to accept it how it is: loud, not nice maybe, but still we have to play football'.
In addition to van Dijk, Dejan Lovren, Adam Lallana and Sadio Mane are all ex-Southampton players who could face their former club on Sunday afternoon.
The likes of Liam Millar, Kamil Grabara and Adam Lewis were all in action for Steven Gerrard's side.
Southampton have no new injury worries, with Manolo Gabbiadini back in the mix, but Charlie Austin remains sidelined with a hamstring injury.
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He then revealed that he was wearing Georgia trousers and a Georgia shirt, confirming that he was joining the Bulldogs. Campbell chose Georgia over Alabama and Miami among others during a signing day announcement at his school.
In a recent interview, for as much as these things really matter, Firmino has come out saying that he's very happy with his situation in Liverpool and hopes to remain with the club for the foreseeable future.