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Liverpool boss Jurgen Klopp could not have been more unequivocal.

Speaking ahead of the Premier League opener against West Ham United at the weekend, Klopp gave a rousing backing to his new-look backroom staff.

As well as overseeing a £170million-plus restructure of his squad this summer, the Reds boss has also tweaked his coaching set-up with Pep Lijnders returning to the club.

Zeljko Buvac, who has been absent from the club since April due to “personal reasons”, is not expected to return with his absent likely to be confirmed by Liverpool in the coming weeks.

But who are some of the key people in which Klopp places his “complete trust”?

Peter Krawietz (assistant first-team coach)

Krawietz followed Klopp to Anfield from Borussia Dortmund in October 2015, having first worked together at Mainz when Klopp was manager and Krawietz chief scout.

The 46-year-old German, who was not a professional footballer, was given the nickname “The Eye” by Klopp due to his background in scouting and video analysis.

“We are like a music band, with their own instrument,” said Krawietz of working on Klopp's staff.

“Jurgen is the band leader, and others are behind him playing the bass guitar or drum. I’m not sure which instrument is mine!”

Pep Lijnders (first-team coach)

(Image: Andrew Powell/Liverpool FC via Getty Images)

Klopp wasted no time in bringing Lijnders back to Liverpool in June, the Dutchman having briefly left in January to take charge of NEC Nijmegen in his homeland.

Lijnders had previously spent three-and-a-half years with the Reds, first as Under-16s coach at the Academy before being named first-team development coach in 2015 where he helped bridge the gap between Kirkby and Melwood.

The arrival of Klopp saw Lijnders elevated further to become an important member of the backroom team.

Officially, Lijnders currently holds a senior coaching position, but is expected to assume the role of assistant coach once Buvac's departure is confirmed.

John Achterberg (first-team goalkeeping coach)

(Image: John Powell/Liverpool FC via Getty Images)

Another Dutchman, Achterberg joined Liverpool's backroom staff in June 2009 having spent more than 10 years at Tranmere Rovers, primarily as a player before moving on to the backroom staff.

Achterberg was promoted to his current position in the summer of 2011, and has worked closely with Liverpool's goalkeepers since.

As such, the Reds' travails between the sticks have prompted criticism of Achterberg from supporters in recent years.

However, Klopp said last week: “John is the first in the building and the last to leave. He's constantly in there developing, changing training programmes, working with the boys.

“For me, he's a fantastic goalkeeper coach. There's not any reason for criticism.”

Andreas Kornmayer (head of fitness and conditioning)

(Image: John Powell/Liverpool FC via Getty Images)

Kornmayer joined Liverpool in July 2016 after more than 15 years with Bayern Munich.

Given the Reds' reliance on energy, huge importance is placed on the efforts of Kornmayer, who hugely impressed Klopp during his time at Bayern where he worked under Louis van Gaal, Jupp Heynckes and Pep Guardiola.

“I try to get everything fixed, done and in motion so that everybody is really clear on what they have to do,” says Kornmayer. Indeed, Klopp says: “He needs to be the ‘bad boy’ from time to time because players don’t like running!”

Kornmayer is probably best known, though, as being the guy on the bench who looks an awful lot like the manager.

Dr Andrew Massey (head of medical services)

(Image: Andrew Powell/Liverpool FC via Getty Images)

Dr Massey was a professional footballer in the Irish League until injury prompted him to enrol on a university course studying physiotherapy.

After further studies in sports physiotherapy and medicine, Dr Massey worked as the Belfast Giants ice hockey team's physiotherapist before being appointed their team doctor.

He then went on to become national team doctor with the Irish Football Association and Linfield FC and, after gaining qualifications in sports medicine, was appointed by Liverpool as Academy doctor in 2013 and had a part-time role with the first team the following year that was made permanent in July 2015.

Philipp Jacobsen (medical rehabilitation and performance manager)

(Image: Liverpool FC)

The newest recruit to the backroom staff, Jacobsen joined in June this year to work alongside Dr Massey.

The German was senior physiotherapist at the Aspetar facility in Qatar, which is regarded as one of the world's leading specialised orthopaedic and sports medicine hospitals. He headed up a specialist team assigned to the care of elite visiting athletes, mostly from football and athletics.

Jacobsen had previously worked with the Qatar national team as well being on the medical staff at both Panathinaikos and Portsmouth.

Mona Nemmer (head of nutrition)

You are what you eat, so the phrase goes. And Nemmer has overlooked Liverpool's nutritional needs since arriving in 2016.

“Mona is heart and soul, she is everything,” says Klopp. “She is so smart. Not one player is in doubt about her – that’s outstanding.

"Nobody likes it when someone tells you what you’re eating is not good, but Mona is really strong in this.”

Nemmer was a chef and nutritionist for the Germany under-21 team for four years as well as being responsible for all the national youth teams, before moving to Bayern Munich in 2013.