The Dutchman underwent successful surgery in London a couple of weeks ago after he suffered an ACL injury in the early stages of the 2-2 draw with Everton last month.
Van Dijk was forced off injured inside the opening 10 minutes at Goodison Park after being on the end of a challenge by Everton goalkeeper Jordan Pickford.
The Anfield club have not given a time frame for how long the £75million man will be absent, but Jurgen Klopp is hopeful that due to the centre-back being a quicker healer it should speed up his recovery process.
And Wijnaldum has revealed his fellow countryman has been going through ’hell’ since picking up the injury.
“Virgil will return with God’s will,” the midfielder told Dutch newspaper VI.
“It is a difficult time for him; this is the worst thing you can experience as a football player.
“You go through hell. But I think he is very strong. We FaceTime every now and then and that is very nice.”
A lot has been made about the upcoming round of international fixtures with many clubs unhappy about their players travelling around the world given the current Covid threat.
But Wijnaldum is upbeat after joining up with the Netherlands team and looking to his side’s fixtures against Spain, Bosnia and Herzegovina and Poland.
He said: “As a club you never have the guarantee that you will get players back completely fit.
“We play three international matches and that takes energy. But as a football player I think it is great to play many matches with the Dutch national team.”