Robertson and Salah will leave the club at the end of the season once they wave goodbye to fans on the final day of the campaign against Brentford this Sunday.
The pair have won every trophy available with the club, pushing Liverpool to new heights under both Jurgen Klopp and Arne Slot over the past decade.
It will be an emotional farewell for the pair, who will also join former players Jordan Henderson and Caoimhin Kelleher in saying goodbye to the Anfield crowd.
Speaking to the club’s official channels, Van Dijk says it will be hard to replace Robertson and Salah who will be a huge loss on and off the pitch.
"I think it's pretty difficult to sum it up (what they have done for the club). Obviously in a good way, of course.
"They've meant so much to the club, they've meant so much to me personally, they have meant so much to all the successes that we have achieved over all those years.
"And obviously as the human beings they are, I think it's tough to replace that, it's tough to move on from that, but that's life as well. They have been absolutely amazing to be working with, to be playing with, to be having around and I'm 100 per cent going to miss them."
Salah, who announced his decision to leave Anfield in March, told reporters in December that his relationship with head coach Slot had broken down.
He posted over the weekend that the football the club were playing was not good enough as they struggle for Champions League football. A win at Brentford would secure their place amongst Europe’s elite, which would be a fitting end for the pair.