The Reds enjoyed a very comfortable 4-0 win over Newcastle on Boxing Day, but have no time to celebrate their six-point lead at the top of the Premier League.
Three days after that victory, Klopp’s side are back in action at Anfield as they host fifth-placed Arsenal in their 20th league game of the campaign.
Few players were afforded a recovery day as the manager oversaw training less than 24 hours after full-time on Wednesday, with the majority of his key names pictured in training.
The absence of the latter pair has prompted Klopp to include 16-year-old summer signing Ki-Jana Hoever again, however.
Hoever, who has been in excellent form for the U18s and U23s so far this season, was also joined by academy team-mates Kamil Grabara, Adam Lewis and Isaac Christie-Davies.
The presence of Lewis could have been significant in the wake of Alberto Moreno‘s comments on his future, but the Spaniard made his return from a minor back injury to take part.
It is likely they are simply in recovery after Wednesday, having both been substituted before the 70th minute, with the duo close to clocking 2,000 minutes on the pitch for Liverpool already this season.
Alisson, Trent Alexander-Arnold, Andy Robertson, Jordan Henderson, Mohamed Salah, Sadio Mane and Xherdan Shaqiri all trained after starting against the Magpies, along with substitutes Nathaniel Clyne, Fabinho and Daniel Sturridge.
Naby Keita was also part of the group, with the Guinean likely under consideration to start against the Gunners.
Alex Oxlade-Chamberlain continued his rehabilitation for a long-term knee injury with an early trip to Melwood at 7am on Thursday, after marking his first time running outside just before Christmas.