Liverpool, like a lot of clubs, have a tendency to continue to nag along at signing one player for a long period of time. Whether this is a result of a stubborn transfer committee or a lazy scouting system, it's hard to know.

This summer presents the ultimate shop window for clubs. EURO 2016 will see many of the continent's best stars in full flow as their respective teams push for the ultimate prize: becoming European champions. Jurgen Klopp will likely have half an eye on the German team's fortunes, but he will surely be checking out some of the other talent at next month's tournament.

Previous targets may well crop up in the Liverpool debate when they really are getting desperate towards the end of this window. Luckily we've given Klopp a hand by compiling a list of FIVE of their previous targets that could slot right into the squad, even now.

So, here they are...

Ryan Bertrand

Southampton's former Chelsea left-back has been in sublime form on the south coast for the last couple of seasons. Filling in at left sided centre-half on occasion, Bertrand is a far more secure alternative to Alberto Moreno.

The England man doesn't have the same electric pace that you would often associated with Klopp's football, but, after the shoddy defensive work of Moreno, there may well be a temptation to take on a more natural defender.

Marco Reus

One of the poster boys of Klopp's Dortmund, Marco Reus will be a central figure in the German side this summer.

His terrorising pace and superb goal ratio makes Reus one of the most in-demand players in the whole of Europe and Liverpool would be pulling off quite the coup if they could sign Reus.

Xherdan Shaqiri

After a slightly surprising move to Stoke, Shaqiri endured a rather indifferent season last time around. Playing on Stoke's right hand side, he was not surrounded with the quality he would be in the Liverpool set-up, though.

Switzerland will be a challenging side to face this summer and that is largely down to the threat posed by Shaqiri. The former Bayern man has the ability to switch between both of his feet and, when coupled with his electric pace, he is the nightmare player to see as a full-back.

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Marc Bartra

Continually on the fringes at Barcelona, Marc Bartra has remained a member of the Spanish national team squad. With the quality centre-halves ahead of him in the pecking order, it is unlikely we will see the Barca man starting too many games this summer, but Liverpool must be considering adding to their options defensively.

Bartra might not be quite the calibre that some Liverpool fans would hope for, but he has experience at the highest level that others cannot offer.

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Shane Long

A revelation over the last season or two, Shane Long has become a desired commodity. His relentless pressing and gut-busting runs behind the defence will appeal to a manager like Klopp.

While Benteke is a surly, languid character, Long's almost hyper-active approach will be on show with Ireland this summer and he'll know he's just dancing in a shop window.

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