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As Divock Origi glanced his hat trick goal into the net, Jurgen Klopp puffed out his cheeks on the sidelines.

Amazement? Relief? Knowingness? Whatever it was, it represented another transformation under the German complete.

Origi has to continue his form from the Southampton game, of course. Indeed, he has to be given the opportunity, with competition for a start up-front fierce.

But in the space of 90 minutes, Origi changed. He started the game as an option few believed in, a raw talent in need of much sculpting; he ended it with the match ball, and with excitement growing about his potential.

It is too soon to hail him as a legend, just as it was too soon to write him off. One thing is for certain, however: he is the latest player to feel the effect of Klopp.

Many others have already felt it. Many have sustained it, too. Simon Mignolet looks more confident, in general, though his Bordeaux faux pas was tres terrible. Mamadou Sakho emerged as a leader before his injury, Martin Skrtel seems more assured, Christian Benteke is more clear about his role in the team.

There are others whose transformations have been staggering. Here are six players who have been overtly boosted by the German over the last six weeks - and just what has changed in their game.

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Alberto Moreno

Revealing stat: Moreno attempted just 17 tackles under Brendan Rodgers, winning eight; under Klopp, he’s attempted 22 more - and won 21 of those 39.

Revealing moment: With Swansea breaking down the pitch on the stroke of half time, Moreno careers back and executes a perfectly-timed challenge to the applause of the Kop.

The big change: Moreno is far more aggressive, and relentless, both in and out of possession. He will look to move up the pitch at any opportunity, but also acknowledges the necessity to get back to defend. He looks more vibrant and alert, although he can still lose runners - as he did against both Chelsea and Southampton.

Dejan Lovren

Revealing stat: The Croatian has won 13 of his 14 aerial duels under Klopp - a far better success ratio than the 12 (in 18) he managed for the previous boss this season.

Revealing moment: There hasn’t been one - and that is what is most important. Lovren is at his best when he is tackling, heading and clearing under the radar. After a string of high-profile errors, they have largely been absent under the new boss.

The big change: Confidence and composure. Lovren has looked much more comfortable since replacing Sakho in defence, and is a more commanding presence overall. He is stronger in the air and knows how to use the ball better. The sense of fear that a mistake is imminent is, for now, gone.

Emre Can

Revealing stat: Despite playing two games fewer under Klopp than Rodgers in this campaign, Can has created double the chances.

Revealing moment: The back heel at the Etihad, leading to Roberto Firmino’s goal, was pretty good - but the audacious clipped ball to Sturridge at St Mary’s leads the way.

The big change: He is focusing on the front foot, more than the back foot, now. His role seems a little more refined, and that bit more defined, too. He has operated in a more attacking capacity when needed, although still offers a bit of solidity defensively. His box-to-box nature fits in with what Klopp requires.

Lucas Leiva

Revealing stat: Since Klopp’s arrival, 74.4% of Lucas’ passes have been forward - a marked change from the 71.9% forward passes under Rodgers this season.

Revealing moment: Wearing the captain’s armband - against both Crystal Palace and Southampton - despite the general consensus his days could be numbered at Anfield. Character, and talent, combined.

The big change: Lucas was expected to be one of those players to struggle with Klopp’s methods, but the footballing chameleon has done it again, adapting to a new manager and giving Klopp what he wants. His role hasn’t necessarily changed - though Klopp insists the term ‘holding midfielder’ is archaic - but he remains the deepest midfielder, in general. His energy and pressing ability has been on display in recent weeks, as he looks to win the ball higher up the pitch and offer some attacking threat.

Adam Lallana

Revealing stat: Lallana was successful with just 20% of his 20 attempted tackles under Rodgers this season; that figure is up to nearly double that with the German in charge.

Revealing moment: One of the first under Klopp, perhaps, with Lallana falling into the arms of his new coach at White Hart Lane - like a small child into the bosom of their mother - after being substituted. It followed a performance of real endeavour and running.

The big change: A curious one. Lallana was brought to Anfield for his goals, assists and general work in the final third, but he has found his niche until Klopp as the workhorse of the midfield. That has blunted him in terms of attack slightly - he was not directly involved in any of the six goals against Southampton - but he looks an integral part of Klopp’s side, something he rarely did under Rodgers.

Jordon Ibe

Revealing stat: Playing just one game more under Klopp this season, Ibe has created three more chances for team-mates than during his spell with Rodgers - despite starting just once.

Revealing moment: His goal in Rubin Kazan is exactly what was expected of him at the start of the campaign. Direct, confident and a fine finish to notch his first goal for the club.

The big change: After such a drop-off in form under Rodgers, Klopp’s presence has seen him regain his confidence. He is also using the ball better, is more willing to take players on and is becoming more of a direct threat. At 19, he appears to be back on track.