The former Borussia Dortmund boss believes the Reds are in fine shape as they look to maintain a top-four challenge in the Premier League and compete for Champions League glory.
“It's really hard in the moment to make the squad," Klopp told Liverpoolfc.com.
“Wow, I've never had a situation like that with the quality of the players not being in the squad.
“They all have made really big steps. Dom Solanke was not in the squad but is in outstanding shape at the moment. Ragnar Klavan , unbelievable. Ben Woodburn makes steps and is really close to everything.
“It's difficult, it's getting more and more difficult, but that's good for us of course."