Wagner has promised his team will “go for it” when they head to Anfield following their 3-1 win over League One side Bristol Rovers in their third-round replay at the Memorial Stadium.
His side had to come from behind after Rovers took a first-half lead through Luke McCormick but the Canaries ended up comfortable winners thanks to goals from Gabriel Sara, Adam Idah and Kenny McLean.
“I haven’t checked my messages yet but I wouldn’t be surprised if Jurgen has already been in touch now we’re through,” said Wagner, who was a team-mate of Klopp’s at Mainz and best man at his 2005 wedding.
“I haven’t seen Jurgen in person since his birthday party last year so it will be great to have a bit of reunion with him.
“But it’s not about us and above all it’s all about making sure my team go to Anfield and do Norwich City proud.
“A tie at Anfield is a really big prize for my team and I know my players will relish the opportunity to take on the Premier League‘s best players.
“But it’s not something that should hold any fear for my players and I will be telling them that we will go for it.
“It will be a great game but there are important Championship games between now and Liverpool but I promise we will be ready and will give a good account of ourselves.”
Wagner saluted his players after their second-half improvement.
“At half-time I asked them to be brave and be positive and so I could not be happier with their response,” he added.
“There are lots of positives we can take from this tie.
“The first 20 minutes we lacked energy but we needed to show more desire, aggression and hunger in the final third.
“When you’re 1-0 behind at a difficult place you can feel the heat and feel the pressure but we rose to the challenge.
“We showed lots of character and stayed strong and stayed together and we will have to show that again at Liverpool.”