Jurgen Klopp's referee anger doesn't compare to when Liverpool boss looked like 'mad German scientist' in Borussia Dortmund outburst... which he later admitted was 'pathetic'
The best moments of the Jürgen Klopp era at Borussia Dortmund
Jürgen Klopp's Borussia Dortmund ICC press conference - YouTube
Jürgen Klopp has already replicated major Borussia Dortmund achievement at Liverpool, so what next? - Liverpool.com
How Jürgen Klopp ripped up his successful Dortmund template to build a new Liverpool machine - Liverpool.com
Jürgen Klopp: The Dortmund years | Borussia Dortmund vs Liverpool FC | UEFA Europa League quarter-final first leg | Bundesliga