Liverpool's pursuit of Sevilla left-back Alberto Moreno is becoming one of the summer's most arduous transfer sagas.

No doubt, the Spain international is an impressive talent - arguably La Liga's equivalent to now Manchester United prodigy Luke Shaw. But Los Palanganos are incredibly reluctant to sell - their reported valuation has gone from £11million to over £20million in the space of single transfer window.

Mirror Football believe the deal could be back on. But we've heard all this before, and it's time for the Reds to consider some alternatives. Just in case Brendan Rodgers is short on ideas, we've listed SIX of them.

Alberto Moreno (Spain)

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RICARDO RODRIGUEZ

Ricardo Rodriguez

The obvious alternative to Alberto Moreno is Wolfsburg prodigy Ricardo Rodriguez, a marauding left-back who shares the Spaniard's entrenched desire to contribute going forward.

The 21 year-old absolutely destroyed the Bundesliga last season and transitioned his potent form into the World Cup, as shown below:

Rodriguez stats

The Switzerland international may not be the most assured defender, but his attacking style would fit perfectly into Brendan Rodgers' progressive philosophy. Here's a look at him in action last season - some of his goals are absolute stunners:

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This World Cup assist to Haris Seferovic wasn't too bad either:

But Die Wolfe are understandably keen not to part with Rodriguez this summer. As well as the Swiss star's agent announcing an apparent €25million price-tag, the Bundesliga side have issued a hands-off warning:

SEAD KOLASINAC

Sead Kolasinac (Schalke)

Another Bundesliga left-back said to be in Liverpool's transfer thinking is Schalke hot shot Sead Kolasinac, who offers a more rugged and conventional style than Alberto Moreno.

The 21 year-old is an impressive talent, having racked up 40 league appearances for the Miners since his debut at the start of the 2012/13 campaign. Last year he kept the ever-dependable Christian Fuchs out of the first team.

The World Cup didn't fare too kindly for the Bosnian international, his tournament typified by this own goal against Argentina:

But the 6 foot full-back was in strong form last season. Here's how he compared to Alberto Moreno:

Kolasinac

Indeed, proficient tackling is a major part of the youngster's game. Take this challenge against Stuttgart for example:

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Or this against against Frankfurt:

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Although Kolasinac found two assists last season and is famed for his high-energy style, the Schalke starlet doesn't offer too much going forward, as detailed below:

Kolasinac forward

And having agreed a new contract until 2017 just last year, the Veltins Arena outfit are under no obligation to sell.

DALEY BLIND

Daley Blind

Netherlands international Daley Blind was absolutely sensational at the World Cup, finishing the tournament with the second-most assists, as detailed below:

World Cup assistz

That includes this sensational delivery to Robin van Persie against Spain:

Not to mention this tidy strike in the play-off to help Oranje clinch third-place:

The prominent form follows an impressive domestic campaign which saw the Ajax utility man claim his club's Player of the Year award. Here's a look at his stats from last term:

Daley Blind statz

And although the 24 year-old may not be a specialist at No.3, his ability to play in midfield or at centre-back would add vital depth to Liverpool's roster.

Should the Reds revive their rumoured interest from earlier in the summer however..

They'll face stiff competition from fellow suitors Manchester United and Barcelona, with the Red Devils reportedly prepared to meet Ajax's £17.5million valuation.

JETRO WILLEMS

PSV Defender Jetro Willems

Another Dutch left-back that's been catching Premier League attention for some time is PSV youngster Jetro Willems, who was on Manchester City's radar back in April 2013:

The 20 year-old was in sensational form last season to find four goals and three assists from defence. His stats were pretty solid across the board too:

jetro willems

Here's a short clip of the Netherlands international - who missed the World Cup through injury - in action. As you can see, his attacking attributes are underpinned by lethal pace and silky skills:

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Currently the record-holder as the youngest player to ever feature in a European Championship, there's no doubting Willems' potential.

But tied down to a contract until 2016, PSV will likely command a sizeable fee to let the youngster leave.

GAEL CLICHY

Gael Clichy

And while we're on the subject of Manchester City, Liverpool could do a lot worse in their left-back pursuit this summer than French defender Gael Clichy.

The 29 year-old is no world-beater but offers vital Premier League experience, having amassed 251 top flight outings throughout spells with the Citizens and former club Arsenal.

Furthermore, the France international is incredibly consistent and offers a very complete all round game, just take a look at his stats from last season:

Gael Clichy

Dependable defensively, influential but not proficient going forward and famed for his blistering pace, Clichy comes with a lot of positives.

The former Gunners star denied plans to leave the Etihad earlier this summer:

But still sharing game-time with Aleksander Kolarov, first team football whilst remaining in the Champions League could be enough to make Clichy reconsider. Here's a short clip of the defender in action:

//www.youtube.com/embed/k6UcVEbiqzo?rel=0

MARCOS ROJO

Marcos Rojo (Argentina):

The World Cup performances of Argentina international Marcos Rojo have reportedly caught the transfer attentions of Liverpool, Arsenal, Chelsea and Southampton:

Indeed, the 24 year-old was nothing short of exceptional at Brazil 2014. Here's his stats from the tournament:

Rojo statttz

No doubt, the Sporting Lisbon defender is a classy and confident footballer, typified by this 'Rabona' clearance in his own penalty box against Bosnia:

He also measures in at 6 foot 2 and is equally adept at playing at centre-half - that could have particular significance for Liverpool, with rumours that Daniel Agger could be sold this summer.

There's hot competition for his signature however, and recent speculation suggest the Saints are planning a £14million bid.

Here's some of Rojo's best moments for club and country:

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