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As the curtain closed on a hugely impressive Premier League season for Jurgen Klopp, the Liverpool manager's thoughts will have no doubt immediately turned to Kiev.

While the other 19 teams in England's top flight will head off for their post-season breaks, the Reds still have the small matter of the Champions League to negotiate against the 12-time winners and current holders Real Madrid on May 26.

The Reds have the chance to assure themselves legendary status against Zinedine Zidane's Los Blancos in less than two weeks.

No matter the outcome in the NSC Olimpsiyskiy Stadium on May 26 though, it has been a massively progressive campaign for everyone connected to Liverpool.

But what of next season?

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

Virgil van Dijk's arrival from Southampton in January helped Liverpool turn in much-improved defensive numbers and a previously maligned back-line finished the campaign with 17 clean sheets - the most since 2009.

At the opposite end of the pitch, Sadio Mane, Roberto Firmino and Mohamed Salah rattled in a combined tally of 90 goals. The deadly trio are widely considered to form one of the very best attacks in European football, and for good reason.

Major surgery is unlikely to be needed either side of Klopp's midfield, but the Reds manager could still have some big decisions to make in his engine room this summer.

Emre Can's departure looks increasingly more likely by the day. Juventus are believed to be the front-runners for his signature, and Liverpool are facing up to the unpalatable prospect of losing a 24-year-old Germany international midfielder for nothing.

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

His exit will be offset by the arrival of gifted Guinean Naby Keita though and Liverpool fans are excited to see what the all-action 23-year-old will bring to Anfield.

That one-in-one-out keeps the squad balanced in terms of numbers, but the long-term injury to Alex Oxlade-Chamberlain provides Klopp with another dilemma.

Oxlade-Chamberlain season was cruelly curtailed when he suffered a serious knee injury against Roma earlier this month, and the Reds were rocked by the news on Monday that he is unlikely to feature again until November.

(Image: OLI SCARFF/AFP/Getty Images)

That provides Klopp with a headache as he tries to finally land a replacement for Philippe Coutinho, who left the club for £142million to join Barcelona back in January.

It is the potential Coutinho replacement that will arguably intrigue fans most this summer.

Nabil Fekir is the latest to be mentioned, but the ECHO understands that no negotiations have taken place between Liverpool and Lyon so far.

Napoli star Jorginho is another who has been linked with a move to Anfield, but the Brazilian-born Italy international is rated at £60million and is also attracting the attention of Manchester City.

And what of Adam Lallana?

(Image: Photo by Catherine Ivill/Getty Images)

He's one of the few Liverpool players to have endured a disappointing campaign. The England international was limited to just 12 appearances, with a string injuries ruining the midfielder's year.

One of the most influential players of the 2016/17 campaign, Lallana, who turned 30 last week, was forced to watch on for much of this term as he team-mates largely ran amok.

He could, of course, still have a telling impact to make in Kiev, but the former Southampton will hoping for better fortunes next season at Anfield.

(Image: ROBERT MICHAEL/AFP/Getty Images)

Marko Grujic's 14-game spell on loan at Cardiff was an important factor in their return to the Premier League, but it is unclear what the long-term future holds for the Serbian international.

Ben Woodburn is another whose next phase of development is unclear.

The teenager was tried at the tip of the midfield by Klopp at times last pre-season, but the Wales international made just two competitive appearances when the real action started.

Gini Wijnaldum, Jordan Henderson and James Milner have all been instrumental in helping Liverpool to the brink of a sixth European Cup. Their importance is unlikely to wane when the 2018/19 season begins in August.

(Image: PHILIPPE DESMAZES/AFP/Getty Images)

Victory in Kiev on May 26 will ensure immortal status for everyone at Liverpool, but Milner, Wijnaldum and Henderson will need help next season, regardless of the outcome in the Ukraine.

For now, it's all hands on deck as the Reds head for their date with destiny on May 26.

But Liverpool's engine room could be set for summer renovation whatever happens in the biggest club game in world football.