Only those with hearts of stone do not feel at least some degree of sympathy towards Loris Karius at the moment.The 25-year-old endured the worst moment of his professional career in May’s Champions League final against Real Madrid, gifting Karim Benzema and Gareth Bale goals with two catastrophic errors.In floods of tears after the final whistle, it was clear that Karius, who took full responsibility for the Reds’ defeat, would need time to recover from this ordeal.After a lengthy summer - he wasn’t involved at the World Cup finals in Russia - the German keeper finally got the opportunity to get back on the saddle when pre-season got underway earlier this month.However, Karius’s nightmare has continued over the past couple of weeks; the former Germany Under-21 international has looked unconvincing in almost every match he’s featured so far.There was the gaffe in the warm-up before the 7-0 win over Chester, then there was his mistake on the free-kick against Tranmere Rovers, and on Sunday evening he made another couple of errors in the Reds’ 3-1 defeat against Borussia Dortmund.Karius was the most relieved man inside the Bank of America Stadium in Charlotte when he rushed out of his goal, messed up a clearance and watched on helplessly as Dortmund shot just wide of Liverpool’s unguarded net.But in the final seconds of the match, he parried a shot straight into the path of Jacob Bruun Larsen, who made it 3-1 from close range.

Karius posts emotional message on Instagram story

It was another crushing moment for Karius, who is also coming to terms with losing his spot as Liverpool’s first-choice keeper following the £67 million signing of Alisson Becker from AS Roma.

How much more can one man take?

Well, not a lot more, judging by what he posted on his Instagram story after the Dortmund match.

Following more abuse from people on social media, Karius uploaded the following firm but heartfelt message…

"To those who take joy in seeing other people fail or suffer, I feel for you,” he wrote. “Whatever it is that's happening in your life to hold this much anger and hate, I pray that it passes and good things come to you."

The poor guy clearly wants people to back off and he has every right to get that off his chest.

Everybody has a breaking point and Karius needs the support of everybody around him right now: his manager, coaching staff, teammates and the fans.

The way things are going, though, it wouldn’t be a shock if Karius is no longer a Liverpool player in the not-too-distant future.

Perhaps a return to Germany would allow him to rebuild his shattered confidence.