Naby Keita is the latest of Klopp's star men to have picked up an injury on worldwide duty, and he joins Mohamed Salah, Sadio Mane and Virgil Van Dijk on the treatment table ahead of Saturday's teatime clash with the Terriers, and Klopp will be eager to welcome them back to Melwood to assess their knocks.
Mane returned to Liverpool for the procedure and will be monitored by the club before their trip to Huddersfield in the Premier League on Saturday.
"The surgery, conducted at a north-west hospital and supervised by club medics, was successful".
The worldwide break has been cruel on Liverpool and the club are sweating on the fitness of a total of four players who picked up problems playing for their respective countries.
Meanwhile, Liverpool are now occupying third position on the Premier League standings with 20 points after eight games played so far this season.
"Now the players go off and play the Nations League which is the most senseless competition in the world".
"People asked why this game was less intense".
"We have to start thinking about the players".
Keita recovered quickly from the back spasm that forced him off during the early stages of Liverpool's 1-0 defeat to Napoli earlier this month, claiming a place on the bench as Jurgen Klopp's side drew 0-0 with Manchester City.
'First of all, I was happy with the opportunity to play again, ' said Mignolet of the chance to start for his country.
Klopp has been a critic of the current global schedule, offering a particularly scathing assessment of the Nations League, as he wants his players to enjoy some rest as the Reds look to challenge in the Premier League and Champions League.