Klein was injured in Liverpools friendly with Dortmund and then missed the next match against Sevilla and returned directly to Melwood. Unfortunately, his injury was worse than expected.
Klop said: We regret Kleins injury, he is in good condition. The only good news is that the cruciate ligament is the only place where the injury occurs, and there are no other complications.
This is not the first time that Klein suffered serious injuries. He almost missed the whole season and lost his main position in the 2017-18 season because of his back injury. The Daily Mail revealed that Crystal Palace had hoped to sign him to replace the departing Wanpisaka, but with Klein seriously injured again, the transfer could only be cancelled.
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