Reaction'Darwin Nunez causes defenders a lot of problems and has so much potential'
Nunez's first Anfield goal for the club was enough to secure a battling victory for the Reds in the Premier League over David Moyes' side.
The Uruguayan directed Kostas Tsimikas' exquisite cross from the left into the back of the net with a powerful header after 22 minutes.
It was Nunez's fifth Liverpool goal since arriving from Benfica in the summer, with Van Dijk delighted to have yet another potent and 'different' option in the squad.
- Want to watch this video? Subscribe to LFCTV GO now and you'll also get first-team highlights and audio commentary, live Academy football, documentaries, boxsets and much more
The No.4 told Amazon Prime Video: "I think he has so much potential. He's still young, he's learning, he's learning the way we play, he's learning English.
"He's the modern-day striker that causes defenders a lot of problems. You can see his runs in behind [against West Ham] and his build-up play is getting better.
"Obviously we have different weapons to try to exploit opponents and that's good."
At the other end of the pitch versus the Hammers, Alisson Becker produced a Player of the Match display to ensure Nunez's header clinched the win.
The goalkeeper made a number of vital saves throughout, including the denying of Jarrod Bowen from the penalty spot right before half-time.
"We play for one of the biggest clubs in the world and to have this goalkeeper with us is something we need," Van Dijk said. "It's a great moment to save that penalty just before the break.
"Clean sheet, good performance defensively, especially in the second half. First half, we could've maybe scored a second.
"But in the end it's all about the three points, especially in this hectic period where we play again in 48 hours or something."
Indeed, Liverpool's focus now quickly turns towards a trip to Nottingham Forest on Saturday lunchtime.
Van Dijk and his teammates are out to record their fourth successive victory in all competitions when they come up against Steve Cooper's outfit.
The Dutchman finished: "We have to just focus on the next game, we know how it works. Everything can change after every game, so we're focused on ourselves.
"We want to improve, we want to have better results and it starts obviously by defending as a unit, and I think we showed that in the last three games especially. So hopefully we can keep it going."
MatchThe opposition lowdown: Southampton
Interview'We can't take our foot off the gas' - Caoimhin Kelleher previews Southampton v Liverpool
Play nowCaoimhin Kelleher birthday quiz: Can you get 9/9?
FeatureClinical Harvey, Robbo's 'bullet' and Danns shock - things spotted in Friday's training
MatchSouthampton v Liverpool: Team news