Forty minutes into the World Cup clash between Cameroon and Croatia Alex Song raised an elbow that he would never forget, one that would ultimately cost his side a chance of reaching the knockout stages.

His stiff elbow into the back of Mario Mandzukic, when his side were only 1-0 down, saw the team reduced to 10 men and their hopes of progressed reduced even further.

The 26 year old later apologised for his moment of madness but it was too late. The damage had been done.

It has often been a case in the career of Song. Concentration and decision making have cost him.

Prior to his move to the Nou Camp, there was reports that laziness, a lack of positional discipline and a player who wanted to get forward more.

At Arsenal he was a key man [11/12 season anyone], a leader of sorts and one of the first names on the team-sheet but he made the decision to swap all that for anonymity and a bit-part role at the Nou Camp.

It’s understandable, the lure of Barcelona is hard to resist. But as we have seen with the likes of Song and indeed another former Arsenal star, Cesc, making the step up from the Emirates to the Nou Camp, appears bigger than it should be.

Just like the speculation this summer, the same scenario was on the table last year when his cousin, Rigobert, formerly of Livepool and like Alex red carded in a world cup match, claimed the player was struggling at the Nou Camp.

Since moving to Spain, he has made just 29 starts in two seasons and now looks set to leave the club. Last season he started 22 games for club and country in all competitions, claiming one assist and 5 yellow cards, 12 of those starts came in La Liga with just one the Champions league.

It was a deterioration on the previous season when he started 17 games in the league and 4 in the UCL scoring 1 goal and collecting 6 yellow cards. A move seems to be the best option for Song to kick-start his career again, it is now without irony that some of Song best games in a Barcelona jersey have come when alongside Sergio Busquets rather than instead of him.

The signs are that Liverpool don’t need him at the moment. The physical changes that Joe Allen has made look set to take him up a level, the signing of Emre Can looks at the moment to be good business while Jordan Henderson’s engine shows no sign of slowly done.

Despite being linked with Napoli, Lucas has looks sharp in pre-season and could yet stay. However if he does go then it would appear that a move for Song makes sense.

Schooled at Arsenal and Barcelona, Song would slot into the Liverpool way with ease while his versatility, he can also play middle of defence, with varied success let it be said.

A good passer of the ball and a strong tackler, Song would give Liverpool a difference dimension and allow them to tinker with their format especially in bigger games, away to the likes of Chelsea, Arsenal, Manchester City, Spurs and Manchester United.

His experience of winning trophies with Barcelona would bring a winning mentality to the team

Of course, given his calibre, Liverpool are not the only club interested with Manchester United keeping tabs in case their move for Arturo Vidal doesn’t come to fruition. Everton, Aston Villa, Inter and AC Milan also keen according to the Daily Star.

One factor that could play into the Reds hand if there interest is real, is Daniel Agger. The reportedly want-away defender has long been linked with a move to Barcelona and if Brendan Rodgers is serious about a move for Song then the dangling of an Agger sized carrot should make negotiations easy.

Liverpool fans what do you think? Do you want Song at the club? Let us know on twitter @fanfeud or in the comments box.