Liverpool boss Jurgen Klopp has been criticised for his hair-trigger temper when it comes to his staff.

Eintracht Frankfurt fitness coach Andreas Beck, who previously worked with Klopp at Dortmund between 2012 and 2015, admitted the current Liverpool boss wasn't shy in letting people know when he was unhappy with them.

Beck, speaking to Goal.com, revealed he was on the receiving end of Klopp's rage when a player he was working with picked up a training ground injury.

“The player felt something muscular at the end of the training session," he said. “Kloppo made a connection with my individual warm-up session and he was asking 'why was the player doing this exercise?'

“He was just letting off steam at that moment. I felt his anger was very unjustified because he only had very general information.

“To put it simply, I did some work with his upper body before the session and he got an injury in his lower body, but I didn't have a chance to explain it to Kloppo properly. But that might have been unwise anyway!"

Beck believes that Klopp's reputation as a boisterous, larger than life personality, is entirely justified, albeit with a tendency to erupt on occasion.

“He doesn't pretend and he is what he is," he added. “Just as he can be warm and very funny, he can also be quick-tempered.

“He has a very strong opinion and it depends a little on the situation whether and when you discuss with him - that's probably no different as a journalist."

Beck also said that although they didn't always see eye-to-eye, they had a good working relationship and Klopp would always allow time for his staff to get their points across.

“In a calm setting, however, there was never a problem to address matters worth discussing. Our arguments were heard and accepted," said Beck.

“On the training ground in Brackel he definitely put me in my place once or twice. In the course of a productive collaboration, there is always friction."