Why Jose Mourinho and Chelsea Should Fight to Keep David Luiz

The transfer window is officially open, and the rumours surrounding summer activity at Chelsea are causing quite a stir. Many of them concern signings that would make most fans very happy, such as The Sun's report of Jose Mourinho's long-awaited return and Gazzetta Dello Sport's report (h/t the Daily Mail) that the club is still pursuing Edinson Cavani.

However, there is one that will cause a lot of squeaky bums until it is resolved.

David Luiz has become a cult hero at Stamford Bridge since signing from Benfica in 2011. His positive attitude and dedication to the cause have seen his stock with the fans rise to stratospheric heights, and there are reports from the Daily Star that Roman Abramovich shares the supporters' sentiments.

In normal circumstances, he would be wearing a blue shirt for many years to come. However, this Daily Mail report shows Barcelona have been chasing the defender since March 2012 and they are not yet ready to give up on a deal this summer. 

As of now, The Sun claims Luiz is "flattered" by the interest from the Catalan giants. The Daily Star reports he also has refused to rule out a move in the future. With Express reporting that Mourinho is reportedly ready to sell Luiz to free up further transfer funds, this is an excellent time to remind Chelsea exactly what they will lose if they let him go.

He Is Hilarious

Whilst the most important reasons behind the desire to keep Luiz at Stamford Bridge are footballing ones, his sense of humour also plays a big part. His celebrations after the Champions League victory provided some comedy gold that has still not lost its lustre, and he continued in that vein throughout 2012-13.

All that, and he calls everyone "Geezer."

He Scores Goals Like This

Despite spending most of his game-time as a centre-half, David Luiz loves to have a shot at goal. Whilst he has racked up some spectacular misses, they are worth it for the quality of the goals when he does score.

He Is an Ambassador

Chelsea have received a lot of negative publicity over the past few years and they have become the team that everyone loves to hate. However, Luiz looks set to change people's perceptions of the Blues. His social media accounts are filled with positivity, and he does his fair share of charity work to boot.

Those qualities have received some very positive reactions from the media, as well as rival fans, and hanging onto Luiz could help to improve Chelsea's image within the game.

He Is a Leader

If you watch this video compilation of his midfield appearances for Chelsea closely, you can see the qualities that have seen Luiz touted as a future club captain. He leads by example, and is always looking for the ball. Unlike some more selfish players, however, Luiz is able to balance that desire for glory with the need to read the game.

With the "Old Guard" of John Terry, Frank Lampard and Petr Cech nearing the end of their careers, Luiz's big personality will ease the transition to the new generation.