Jamie Carragher suggested the £75 million defender could "lose a bit of weight" after failing to build a regular run of games for his new employers.
He was benched for Tuesday's victory over Huddersfield Town, a decision Klopp insisted was "normal" given Van Dijk has only just arrived in Liverpool.
"Wow. I'm sure Jamie needs to lose a little bit of weight."".
"He is a big and tall player, that is how it is. You miss a player for a week and you think "okay, we need another player", Klopp said. Being fit means having more muscle than anything else. "It is not an issue, not at all".
Ahead of hosting Tottenham Hotspur in a crunch top-four clash on L4 this Sunday, Klopp said: "Hopefully in the next game it will be similar or even better".
"I don't know him long enough to say "Yes you can play all three games" in this moment so we had the opportunity with Dejan (at Huddersfield) so we had two completely fit players".
Rex Tillerson Starts Latin America Tour With Visit To Mexico
Bush, told Fox News that the secretary's trip is important to stem the influx of illicit drug trade into the U.S. Tillerson said many countries in Latin America, such as Venezuela and Peru, have untapped energy resources.
Treasury Department copied list of Russian execs from Forbes
Russian President Vladimir Putin has said that Moscow would not react for now, although he has described the publication of the report as an "unfriendly act".
Manchester United block Daley Blind move to Roma on deadline day
I can confirm that Roma want him, but Manchester United don't want to loan him out and only want a permanent solution. They would not want to sell it now, but only in the summer, the price is good, but the operation is hard .
"We played well against Liverpool at home when we beat them 4-1 and so we have to go there full of confidence". But we need really the right thing.The right thing now, you don't get.
"I spoke to him and he expected it".
The Reds boss insisted that everyone "will all see" Van Dijk "at his best after the summer" but insisted that they don't "have the time to wait until then" and that regardless the defender "can bring a lot of things in already".
"The defending style of our defending is different to Southampton, that's why it makes sense that you get used to it".