He added: “He always accepted me and he was very kind to me, so I will always be thankful for that. I know he’s a great guy, and it’s nice to see him doing so well for Liverpool.”

Pulisic is expected to leave Germany in 2019 having seemingly made no progress in negotiations over a contract extension at the club.

The forward could become the subject of a bidding war next summer if Dortmund look to sell for a fee in order to avoid losing him on a free transfer when his current deal expires in 2020.

Though he won’t be allowed to leave in January, Pulisic recently confirmed he would sit down to discuss his options during the Bundesliga’s winter break.

In light of the very public mutual admiration, it seems increasingly likely Klopp would be one of the leading candidates to secure his signature were he to pursue the deal.