Wagner's Terriers secured a historic promotion to the Premier League on Monday by defeating Reading in a penalty-shootout in the Championship play-off final.
45-year old Wagner and the Liverpool manager have known each for over 20 years. The pair met at Mainz in the early 90's and have since developed a life-long friendship.
And now, Wagner has hinted that he might have to call on a favour from his pal to keep goalkeeper Danny Ward, who has spent this past season on loan from Liverpool and on Monday became the Yorkshire club's hero during the penalty-shootout.
When asked if he will attempt to keep Ward at Huddersfield, Wagner said: "I think I have a lot of calls to do."
"This is maybe why I don't want to get my head around it because I know how much work is ahead of me.
"There are a few phone calls and I will speak with Jurgen [Klopp] for sure, not only about Danny but about everything that happens.