Liverpool fans might want to look away now.
Joel Matip produced a dreadful individual error for Schalke to gift Shakhtar Donetsk their second goal in the Europa League round of 32 on Thursday night.
The 24-year-old, who has agreed to join the Reds when his contract expires in the summer, inexplicably headed the ball into the ground, allowing Taison to gain possession just outside the penalty area. The Brazilian then squared the ball to Facundo Ferreyra who couldn’t - and didn’t - miss. (Scroll down this page to watch the video).
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Shakhtar went on to win to win the match 3-0 at the Veltins-Arena in Gelsenkirchen - an embarrassing result for the Bundesliga outfit.
Liverpool fans will be hoping that this error was a one-off from Matip, rather than a sign of things to come.
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Video: Joel Matip's mistake
Liverpool supporters react to Matip’s mistake
Jurgen Klopp confident Matip will flourish
However, if Jurgen Klopp is right then the Anfield faithful have nothing to worry about.
The Liverpool boss expressed his delight earlier this month following the acquisition of the Cameroon international.
"I am very happy. Everybody who knows him would have been interested," the Liverpool manager told the club's official website, per Sky Sports.
"Maybe he's not the most famous player in England, but he's 24 and has played about 200 Bundesliga games for Schalke.
"He is a top-class centre-half, very young but experienced. You don't have that too often. To be honest, when I had my break I thought for the next club, I should think about Joel, if there was a need.
"He never played for my team, he did the extreme opposite - he played for their biggest opponent. Maybe that says a lot about his quality. Even when he played for the team you cannot love as Dortmund manager, you see his quality. Then that's real quality.
"The chance was there and Joel wanted to do something different. He is and was really close to his club; it's normal, he played there since he was a youth player. I think there was no chance for another Bundesliga club in this moment, but Liverpool was the right name and the right club.
"Maybe it was a little advantage that I know him and he knows me. He's still a young player and for a young player, it could help to make the decision when there's a manager from your home country.
"It's a good situation, hopefully a win-win. In this moment, it looks like this. Now he has to stay healthy and after the summer break we can start working together."
Liverpool fans will be hoping Matip gets all errors out of his system before he arrives at Anfield this summer.
Will Joel Matip prove to be a decent signing for Liverpool - or will he be a flop in the Premier League? Let us know by leaving a comment below.