Sadio Mane claimed the headlines in the Allianz Arena with two goals, either side of Van Dijk's 69th-minute header, that helped Liverpool seal a 3-1 round-of-16 second-leg win against Bayern Munich, which clinched a place in Friday's quarterfinal draw.
"Hendo's injury is serious enough to rule him out of the weekend. The global break will be long enough to bring him back", Klopp told a news conference.
"It's a little one with the ankle, how it looked in the first place".
"We are level on points and Bayern have the better goal difference, but we still have nine games to play and a lot can happen in that time", he told the Bundesliga's official website. Not good, but okay.
"Then you see how we are playing in the Premier League - we have only lost one game - that is confidence and helping us move forward as a team".
Now 32, Babel hooked up with Fulham on a short-term contract in January and has played eight Premier League games for the Cottagers, scoring once.
Storm Gareth: Strong winds and heavy rain predicted
The Met Office has issued an official yellow weather warning for wind, which remains in place until 3pm on Wednesday (March 13). Over the weekend the high winds wrought havoc across the region, with gusts of up to 60mph recorded in some areas.
Wijnaldum is the most senior, established player yet to be rewarded with a new contract after the likes of Salah, Mane, Roberto Firmino, Trent Alexander-Arnold, Joe Gomez and Jordan Henderson all got new deals in the last 12 months.
"Virgil gives organisation on set pieces, and he is unsafe", Klopp said with some understatement.
"Psychologically we didn't struggle because we are not ahead of them any more and it doesn't change", he said.
"But when the players played, they all did well". I was loved in Liverpool, I had good relationship with the fans and my team-mates but I felt I could do better. All the stories will be written, but we will accept them because it means we won the game.
"The approach was exactly the same as against Wolfsburg or Borussia Monchengladbach [games they won resoundingly] so I can not agree with the criticism", he told a media conference ahead of Bayern's Bundesliga clash with Mainz on Sunday. "They do a brilliant job, both of them".