The 25-year-old was at fault for two of Real Madrid‘s three goals in the Kiev defeat, rolling the ball straight to Karim Benzema’s foot and then allowing Gareth Bale’s drive to slip through his hands.
No-one realised the German was suffering from a knock he took to the head from Sergio Ramos – something which Klopp was only alerted to by Franz Beckenbauer days after the final.
But as Karius prepares to make his first appearance since the final in a friendly at Chester on Saturday, Klopp stressed it was business as usual.
“It’s all normal here. I don’t know exactly what people think or made of the situation. The only thing I can say is he had a concussion in the game,” he told liverpoolfc.tv.
“He didn’t feel it obviously. The guy who has it is the last one to be aware of it, probably.
“If you ask Loris, he says he didn’t think about it and didn’t use it for a second as an excuse.
“We don’t use it as an excuse, we use it as an explanation.
“So from my side everything is fine. We don’t think about that any more and we start completely new.
“He was influenced by that knock, that is 100 per cent. What the rest of the world is making of it, I don’t care.
“It’s really not important what the people say. We do not use it as an excuse.
“Now people could think for us it is the explanation – and for me it is 100 per cent the explanation and that’s all.”
The original collision with Ramos went virtually unnoticed and Karius’ concussion was not discovered until five days later, when the player went for assessments while on holiday in the United States.
It was a call from Beckenbauer, however, which alerted Klopp to the issue.
“He called me and said he came from a doctor, he told me: ‘Your goalkeeper had a concussion’. I said ‘What?’,” he added.
“I got all the pictures from different perspectives, saw it and thought: ‘How can we all think that the boy who didn’t show any weakness in that game until then made these big mistakes in a very important game and nobody thinks it’s because of the knock he got?’
“That was, for me, the explanation. I thought it was too late, you cannot check that but now I know a concussion isn’t coming and going in a day – if you have one, you see it days later.
“Five days after the final, Loris had 26 of 30 markers for a concussion still.”
The Dutchman left in January to take charge of second-tier side NEC Nijmegen in his homeland but parted company with the club in May after failing in the Eredivisie promotion play-off.
He was immediately offered his Reds job back and was present for the start of pre-season training this week with Lijnders’ return bolstering a backroom team which is still without Klopp’s assistant Zeljko Buvac, who has been absent for what the club say are personal reasons since April.
“It’s good. It’s very, very good. We sent him away for half a year to get very important experience and to have him back now feels just fantastic,” Klopp told liverpoolfc.com.
“When he came in the building, everybody was really delighted about that and was really happy about it.
“He’s a fantastic person and a fantastic coach, so it’s really important that we have him back and I’m really looking forward to working together with him.”
Klopp: “To have him back now feels just fantastic.”
— Liverpool FC (@LFC) July 3, 2018
Liverpool’s run to the Champions League final has now been consigned to history but Klopp is keen to build on the progress which was made last season.
He has already started that with combined £96million addition of Naby Keita and Fabinho, with both midfielders in from the start of pre-season – something the Reds boss always puts great store by for new signings.
“We are always ambitious, we are still ambitious,” added Klopp.
“We did a few nice things in the last couple of years, but we know as well that we can still improve so we want to build on the things we’ve achieved so far.
“We know all the good things, we know all the not so good things. Life is always (about) learning from your experiences, I hope we can show that.”
Another player happy to be back in training in early July is left-back Andrew Robertson.
The Scotland international joined from Hull on July 21 last summer so missed three crucial weeks, including four friendlies, two as part of the club’s mini-tour to the Far East.
That impacted on him securing a regular first-team place, which did not happen until Alberto Moreno’s injury in December.
“This season I’m settled and I can really focus on pre-season.” @andrewrobertso5 expects to feel the benefits of what will be his first full pre-season at #LFC 👉 https://t.co/e3jT3mD1FJ pic.twitter.com/kYGSPEAA7W
— Liverpool FC (@LFC) July 3, 2018
“I came in a bit late and missed the trip to Hong Kong, which I was a bit gutted about,” he said.
“I think I did the first three weeks with Hull so it was a lot different – it’s always good to get a full pre-season with the team you’re going to be with.
“I knew I was leaving Hull last season so it was a tough one but this season I’m settled and I can really focus on pre-season.
“Over the close season I’ve been working on getting fit and now I want to get fitter until August and it’s all leading up to that West Ham game now.”
The Egyptian moved to Merseyside from Roma last June and went on to win the Premier League Golden Boot, scoring 32 times and in turn setting a new benchmark in a single 38-game season.
Salah also came to the fore during Liverpool’s run to the Champions League final and Liverpool have ended any speculation about his future – although they have not disclosed the length of the deal.
Liverpool boss Jurgen Klopp said on the club’s official website: “I think this news can be seen for what it is; rewarding a person who performed and contributed greatly for the team and the club last season.
“It demonstrates two things very clearly also – his belief in Liverpool and our belief in him.
“We want world-class talent to see they have a home at Anfield where they can fulfil all their professional dreams and ambitions – we are working hard together to achieve this.”