He kept the squad's time in the United States to a minimum, arriving in Charlotte the day before the defeat by Dortmund and flying home immediately after the victory over United in Michigan.
The swift departure was so that Liverpool could have an extra day's work at last week's training camp in Evian.
Klopp referenced the impact of the World Cup and the lengthier absentee lists at Tottenham, City and United several times on the tour.
His squad is healthier by comparison and, mindful of how City left their rivals trailing at the start of last season, he is aiming to follow suit against West Ham, Crystal Palace, Brighton and Leicester City before the first international break.
THE GUARDIAN
Talking points
1 CAN SALAH MAINTAIN HIS FORM?
All eyes will be on the Premier League Player of the Season Mohamed Salah, with managers and defenders poring over videos in search of a way to stop the striker, who bagged a record 32 league goals last season.
Despite scoring twice in Russia, the Egyptian star did not look fully fit at the World Cup and Liverpool will need to use him wisely in the early stages of the new campaign to protect their main attacking threat.
2 TIME FOR KLOPP TO DELIVER
Jurgen Klopp arrived at Anfield in October 2015 joking that he was "The Normal One", but there has been nothing pedestrian about the attacking football his team have dished out under his reign.
While the German has delivered back-to-back fourth-place finishes and some memorable victories, the bottom line is the trophy cabinet remains unchanged.
The Reds have lost three major finals under Klopp and that has to change this term.
3 KEEPING EVERYONE HAPPY
Emre Can's departure for Juventus meant Liverpool's midfield needed strengthening and in came Naby Keita, Fabinho and Xherdan Shaqiri.
All three appear to be astute signings and give Klopp more options in his favoured 4-3-3 formation. But it could also restrict the playing time for stalwarts Jordan Henderson and James Milner, captain and vice-captain respectively, and unsettle the balance Klopp has managed to create within his squad.