When Jurgen Klopp first took over at Liverpool in October 2015 and vowed to turn the Reds from doubters into believers, hands up who actually envisaged the success he would ultimately bring to Anfield.

Sure they were cute words, a great sound-bite and a dream declaration for the media and marketing world alike.

But having seen the likes of Gerard Houllier and Rafa Benitez ultimately fall short as the Reds waited in vain to win the Premier League, what made this charismatic German any different?

Yes, he had toppled Bayern Munich in Germany but Benitez had done the same to Real Madrid and Barcelona in Spain.

The odd trophy and a return to the Champions League seemed achievable after a decade in the doldrums, but Klopp has exceeded all early expectations.

No longer the domineering giants of the seventies and eighties, the Liverpool Football Club he had walked into were nothing more than a European stepping stone.

They had seen Steve McManaman, Michael Owen and Xabi Alonso all trade Anfield for Real Madrid, Javier Mascherano and Luis Suarez force through moves to Barcelona and Fernando Torres and Raheem Sterling jump ship to Chelsea and Man City respectively in search of silverware.

Come the summer of 2017 and Klopp found himself facing this familiar fight as Barcelona came calling for Phillipe Coutinho with the Reds holding off their advances until the following January.

Using the club record £142m fee to help fund moves for Virgil van Dijk, and later Alisson, Liverpool lost that year’s Champions League final to Real Madrid but it had become clear there was a change in the wind at Anfield.

In November 2018, Sadio Mane signed a new long-term contract with the Reds as Klopp declared Liverpool were a stepping stone no longer.

"I'm really pleased, really happy about the fact he's signed this contract,” the German said. “It's really a big signing. If a player is in a very good moment in his career and you can extend the contract, it's more than just a signing, it's a statement. I'm happy about that.

"It shows a bit of the change the club made in the last few years. A few years ago it constantly happened that players in a very good moment thought they had to leave the club to make the next step.

"Now our boys obviously think they can make the next step here. That's good."

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Again, strong words from Klopp but his side needed silverware to really cement that newfound status.

After all, the Reds had endured 29-years of being also-rans.

But the visit of Barcelona to Anfield on May 7, 2019 saw Klopp’s Liverpool tell the whole footballing world they were nearly-men no more.

Locking horns with both Suarez and Coutinho, the Reds infamously trailed 3-0 from the first leg after a devastating Lionel Messi display at Camp Nou.

And while Liverpool’s former idols returned to Merseyside believing they had one foot in the final, their old team-mates had other ideas.

Without both Mohamed Salah and Roberto Firmino because of injury, Klopp’s side knew they had it all to do. But with the roar of Anfield behind them, they had nothing to lose too.

An early Divock Origi tap-in, a furious Gini Wijnaldum brace after his half-time introduction and then a corner taken quickly - you all know how this story goes.

But this 90 minutes is much more than just this famous club’s most famous Anfield European night.

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It is the night Klopp’s Liverpool truly arrived and stepped out of the shadows, dismantling the might of Barcelona and denying their two former heroes a shot at the biggest prize they had both left the Reds to chase.

It is the night Klopp’s Liverpool truly turned doubters into believers, with Salah rocking up to Anfield for his supporting act wearing a ‘Never Give Up’ t-shirt hammering home that point even more.

Ultimately falling short in the Premier League title race that year to Man City by the narrowest of margins, Liverpool landed their desired silverware the following month courtesy of a routine final victory over Tottenham Hotspur.

Having conquered all of Europe, they then beat Flamengo to become world champions the following December too.

And in amongst the chaos of the formative months of the coronavirus pandemic, they put together the most extraordinary of domestic campaigns to finally end their 30-year wait to be crowned champions of England.

While the disappointing, injury-plagued campaign that has followed this season has been hard to accept, you’d struggle to find a Liverpool fan that does not believe it to be a one-off, convinced Klopp’s Reds will come back stronger in 2021/22.

A 30-year rollercoaster ride to return to the top, featuring a bitter decline as fierce rivals stepped forward onto their perch in Liverpool’s place, their elite status remains unchallenged.

For now, at least. But even the threat of missing out on next season’s Champions League won’t dethrone them just yet.

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This is still the same club that continue to be repeatedly linked with the likes of Kylian Mbappe and Jadon Sancho.

This is still the same club that has seen Mohamed Salah repeatedly fidget in his seat this year when pushing for a new contract when in the past, he would have been the first man out the exit door in search of glory with a Barcelona or a Real Madrid.

And this is still the same club led by the world’s greatest manager and boasting the planet’s finest defender, with whom, as they proved against the Catalans back in May 2019, anything is possible.

Supporters will return to stadiums in 2021 and Van Dijk will return to Liverpool’s backline with fans and players alike continuing to believe rather than doubt in their side.

The 2020/21 season might have been a step backwards for Klopp’s side but now they will fight back to push two steps forward.

They’ve fought too hard to transform their fortunes since the German first walked through the door not to.

This isn’t the Liverpool of the past three decades anymore. Regardless of any hiccups, their transformation under Klopp is complete.

And as that famous night against Barcelona proved, they never give up.