Robert Lewandowski has described Jurgen Klopp as having "two faces" as he explained why he is the best coach he's ever worked with.
Klopp signed Lewandowski for Dortmund from Lech Poznana in 2010, and worked with the Poland international for four seasons.
Dortmund won two Bundesliga titles in this time, and reached the final of the Champions League, before Lewandowski moved to Bayern Munich.
At the Allianz Arena, Lewandowski played under Pep Guardiola for two seasons, winning a further two Bundesliga titles.
The Polish striker has had the pleasure of working with two men considered managers of a generation, and is well placed to pick between them.
And for Lewandowski, it is the current Liverpool boss who just edges it as he's like a father on one hand, but on the other a brilliant coach.
Lewandowski told ESPN: "I think Jurgen Klopp [is my favourite] and after that Pep Guardiola. 100 per cent.
"[Klopp] has two faces. You can see that he is kind of like a father, but the second part is like a coach, a manager.
"He can tell you everything - and I'm not speaking about the good things - about the bad things.
"Also for [players], he is a huge motivation. He makes this perfect, because he knows where there is this line where he can [push you] more or a little bit less.
"His performance as a coach is amazing, but not only as a coach but also as a man."
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