Liverpool are convinced they know the problem with Florian Wirtz's current performance.
Wirtz has failed to adjust to life as a Liverpool player since joining in the summer, despite having three assists to his name, including an impressive performance against Eintracht Frankfurt.
He has created plenty of chances, but the underwhelming performance of the Reds' attackers has hindered his contribution.
Many different theories have been floated around about why Wirtz has performed poorly, but now, it seems like Liverpool may have their own idea.
Last season, Wirtz was Bayer Leverkusen's star man, with Xabi Alonso's team built around him.
Author's summary: Wirtz struggles at Liverpool.