One Champions League, one Super Cup and one pair of broken glasses. A lot has happened since Jurgen Klopp took over at Liverpool four years ago.

The irresistibly charismatic German took charge at Anfield on October 8, 2015, and has watched his team score 458 goals, set a club-record for consecutive league victories and be crowned kings of Europe.

With every man and his dog reflecting on the boss’ 'best' moments however, we felt it was more fitting to look at the moments that encapsulate the man who has transformed a club and fanbase.

These are the four most Klopp things the gaffer has done since his arrival.

Doubters to believers

Klopp celebrates after Leicester winner

We’ve heard it a million times now, but that doesn’t mean we’re getting bored of it.

Klopp arrived to a chorus of ‘collapsed at Dortmund’ and ‘won’t succeed in England’ shouts from rival fans, and more importantly there was plenty of pessimism from Reds fans themselves, fed up after years of failing to compete with the big boys.

The 52 year-old’s message to the Anfield faithful to “change from doubters to believers” has echoed throughout everything he has done since, right down to the cheeky grin on his face when he said it.

Norwich 4-5 Liverpool

Klopp and LFC players celebrate Lallana's late winner at Norwich

Brilliant, chaotic and scarcely believable – has there ever been a more Klopp fixture than the 5-4 win at Carrow Road?

The four goals conceded pretty much sum up how poor the defence was during his first couple of campaigns, the goals from Jordan Henderson and James Milner remind us of their importance in Klopp’s revolution, while the crazy celebration after Adam Lallana’s late winner was just vintage Klopp.

Liverpool 4-3 Dortmund

Lovren and Klopp celebrate win over Dortmund

If changing doubters to believers was the name of Klopp’s guidebook to turning the club around, then the comeback against his former employers was chapter one.

Not only did it seem implausible that the Reds would turn it around after conceding three away goals, is there anything more Klopp than Dejan Lovren, a man ridiculed and crucified at every opportunity, scoring the winner in front of the Kop? We think not.

Liverpool 4-0 Barcelona

You may look to the Champions League final in Madrid as the final marker of Klopp’s progress, but let’s be honest, UEFA could have printed Liverpool’s name on the cup after the 4-0 win over Barcelona.

Not only was it yet another dramatic comeback, it was truly against all odds. No Mohamed Salah. No Roberto Firmino. No chance.

If ever a match summed up the manic pressing, brilliant football, defensive solidity and never-say-die attitude Klopp has built on the red half of Merseyside, it was this one.