The Dutchman believes Klopp asked for too much too soon from his Reds players.
Frank de Boer has claimed to La Gazzetta dello Sport that Jurgen Klopp caused a spate of injuries at Liverpool by demanding his physical high-energy style be implemented too soon after taking over at Anfield.
Klopp replaced Brendan Rodgers as Reds boss in October and immediately began to preach the fast-paced style of football which he became known for at Borussia Dortmund.
The club's form was inconsistent in the weeks after his arrival as the squad got used to the new philosophy, and though the players began to become accustomed to it after a while, several stars were struck down by injury before or after the new year.
De Boer believes that was a direct result of the physically-demanding nature of Klopp's style, and suggested that the German should have been more gradual in his attempts to transform things on the pitch.
The newly-appointed Inter Milan manager told La Gazzetta: "We’ll see my Inter after four months, that’s the norm. In January, you will have more of an idea about what we are trying to do as I have only arrived.
"We also must be very careful at the moment not to be too intense in training as it can lead to many injuries. I remember [Jurgen] Klopp taking over at Liverpool last October and tried to immediately impose his high-pressing style which he used at Borussia Dortmund and it resulted in several injuries, nine in fact.
"Sometimes it is better to slow down."
Klopp's style may have produced some adverse effects at first, but it has transformed the club into a thrilling and scintillating attacking unit, as shown perfectly by the opening 4-3 win over Arsenal at the Emirates Stadium on Sunday.