Liverpool have come a long way under Jurgen Klopp, as the charismatic German manager closes in on his six-year anniversary with the Premier League champions.

Arriving from Bundesliga side Borussia Dortmund in the summer of 2015, changes were needed to ensure the Reds would become a leading force in European football once again.

Klopp duly made his mark in the transfer market and Liverpool, despite the struggles of this season, have managed to reach two Champions League finals under his guidance - in addition to their memorable, maiden Premier League crown last season.

Here, we take a closer look at the line-up he selected on his first European night at Anfield - which resulted in a 1-1 draw against ten-man Russian visitors Rubin Kazan on October 22, 2015.

Simon Mignolet - As the club's number one for several seasons, Belgian goalkeeper played 155 times for Liverpool in the Premier League alone. Following the arrival of current incumbent Alisson, though, he was deemed surplus to requirements and, subsequently, moved to Club Brugge - where he remains - for £6.4million in 2019.

Nathaniel Clyne - One of Klopp's first signings when he was appointed as manager, the former England defender cost £12.5m when he joined from Southampton ahead of the 2015/16 campaign. After a year on the sidelines with a serious knee injury, Clyne returned to first his first club, Crystal Palace, on a free transfer last summer.

Mamadou Sakho - Another man now at Selhurst Park with ex-Liverpool manager Roy Hodgson. Sakho, 31, played over 50 games in the Premier League, before actually making the club a notable profit in the transfer market when he swapped Anfield for South London in 2017.

Martin Skrtel - In the twilight of his career at 36, the no-nonsense Slovakian has featured only 30 times for Turkish club Basaksehir, who he joined two seasons ago now. On the back of his Liverpool departure, Skrtel also played for Fenerbahce, before a bizarre one-month stint at Atalanta where he wasn't even handed a would-be debut.

Alberto Moreno - As the direct predecessor to Andrew Robertson, who finally ended the club's curse at left-back, Moreno found it difficult to escape criticism during five years in the Premier League. Currently with Villarreal back in his native Spain, the 28-year-old has made just 17 starts over the last two terms combined.

Joe Allen - Still plying his trade in the Championship with Stoke City, where he moved for £13m from the Reds back in 2016, the Welsh international is closing in on 400 senior league appearances. At 31, he might yet even return to the Premier League one. Allen was subbed off by Klopp at half-time against Rubin...

James Milner (capt) - One of only two survivors from Klopp's first European night at Anfield, the evergreen former Leeds United, Aston Villa and Manchester City midfielder has played 30 games across all competitions this year as he continues to have an impact, in a number of positions, at the age of 35. Along with Jordan Henderson, Milner has been a fundamental part of the journey since Klopp's arrival.

Emre Can - Scorer of Liverpool's equaliser against Rubin that night, it might have been an embarrassing initiation for Klopp on European duty had his compatriot not made his mark immediately after Oleg Kuzmin's red card. Now with Klopp's former club Dortmund, he returned to Germany on a permanent basis only last summer, following an initial loan from Italian giants Juventus.

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Adam Lallana - A key part of the Klopp era in his own right, the former Saints playmaker returned to the south coast with Brighton ahead of the current season. His experience, capped off with Champions League and Premier League medals at Anfield, should prove priceless as the Seagulls aim to preserve their top-flight status this term.

Philippe Coutinho - One of the more surprising inclusions in a game where Liverpool rung the changes, Coutinho played for an hour as the ten-man Russians proved difficult to break down. It's not always gone according to plan for the Brazilian since his £130m move to Barcelona, either, as speculation over a summer transfer continues to mount, at the Nou Camp and beyond.

Divock Origi - Although the Belgian, now 25, has yet to command a regular starting place at Anfield under Klopp, he did provide his manager with, arguably, the most iconic moment of his tenure so far, scoring THAT all-important second goal during the Champions League final victory against Tottenham Hotspur, in Madrid, two summers ago.