The Swiss international had already assisted Daniel Sturridge’s strike earlier in the second half before producing a piece of magic of his own.
Asked about the debut performance, Klopp says that he has been left stunned with how quickly Shaqiri has fitted into the Liverpool system.
“Yeah it was good,” the Liverpool boss said on the goal.
“It’s not normal that a player after four days adapts so well to the style of play.
“It was better than I would have expected.
“But today was a game that was quite easy to come into.”
Liverpool ran riot in front of 100,000 people at the Big House in Michigan, with Sadio Mane, Sturridge and Sheyi Ojo finding the net before Shaqiri’s volley.
Andreas Pereira had levelled the game in the first-half with a spectacular free-kick in which rookie goalkeeper Kamil Grabara was left helpless.