Loris Karius has endured a nightmare summer.

The 25-year-old German goalkeeper replaced Simon Migolet as Liverpool's number one midway through the 2017/18 season.

And Karius had cemented his spot as Liverpool's first-choice 'keeper by the end of the season.

But then disaster struck in the 3-1 defeat to Real Madrid in the Champions League final.

The former Gladbach stopper made two horrendous mistakes to gift goals to Karim Benzema and Gareth Bale.

Karius returned for pre-season in July but his performances in Liverpool's friendly matches have been littered with mistakes.

Jurgen Klopp reacted last week by splashing out a record-breaking £67m on Roma goalkeeper Alisson Becker.

Karius has received plenty of abuse on social media over the summer and he's not the first Liverpool player to suffer this kind of treatment.

Croatian defender Dejan Lovren has previously been the target of online trolls following disappointing performances in a Liverpool shirt.

After the 3-1 pre-season friendly defeat to Borussia Dortmund, Karius was slammed by 'anfieldclub._' on Instagram.

Furious at the treatment of his under-fire teammate, Lovren - who is still on holiday after reaching the World Cup final - responded to the post with a brutal message.

"You are full of s***," replied Lovren. "Shame on you how you treat our player! And also the name Liverpool fan page."

Well played, Dejan.

It may only be a minority of Liverpool fans - but they really must pay attention to the club's slogan: You'll Never Walk Alone.

Karius published an emotional message on Instagram after his shaky display against Borussia Dortmund on Sunday night.

"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.”

Legendary goalkeeper Iker Casillas sent Karius a message of support on Twitter.

“Will this attack on [Karius] ever end? I’m talking about him like so many other goalkeepers,” Casillas tweeted.

“There are many more serious problems in the world, f***! Leave the kid alone! He’s also a person. As we all are!”

Alisson is yet to link up with his new teammates so Karius is expected to start when Liverpool face Manchester City in the International Champions Cup late on Wednesday night.

Is Lovren right to criticise the Liverpool fan page? Let us know your opinion by leaving a comment below.