When David Luiz was re-signed by the Blues on transfer deadline day this summer, twitter ran riot and many respected pundits (as well as the punters in the Transfer Tavern) cried out in unison regarding the strange and laughable transfer.

Chelsea were lauded for flogging the Brazilian a couple of years ago, recouping a world record £50m for a defender.

When Brazil were humbled 7-1 by the Germans in the World Cup 2014, some may have claimed that it was the most satisfying profit ever made.

However, the Blues paid PSG upwards of £30m this summer to re-sign the 29-year-old.

Antonio Conte’s need for a centre-back was very noticeable, but bringing the bushy-haired defender back took everyone by surprise.

However, after a less than successful start, Luiz has now been part of the Chelsea squad that has kept 4 consecutive clean sheets and have won four out of four.

More and more, the former Benfica ace is looking assured in central defence as the Stamford Bridge titans become more and more composed.

Here are a couple of ways in which he is proving the doubters wrong:

Calm and composed

One of the faults often perceived about Luiz is that he makes poor decisions and gets flustered on the ball.

He would often be known for trying a crazy trick on the edge of his own box, or holding on to the ball for far too long, rather than doing the correct thing and taking the pressure off the Chelsea back line.

However, under Conte, he appears to have worked on his decision making and is maybe finally turning into a reliable defender.

In their most recent impressive victory away at the Saints, Chelsea kept a clean sheet but more importantly Luiz cleared the ball, sometimes into the stand, when he acknowledged the sense of danger.

That’s a truly important quality for a player in the Premier League and if Luiz can carry on in this form he will be hard to get past.

Tactically aware

Another crucial feature about Luiz’ previous reckless defending was his tactical ignorance.

He would often be found out of position further up the pitch or simply ruining the consistency of the back line.

However, under Conte who is known for his strict tactical approach, the Brazilian appears to be surprisingly flourishing.

In the past four matches, Chelsea have resorted to a back three lining up in a 3-4-3 formation with two wing backs who make it a back five when defending and attack as part of the midfield when Chelsea have the ball.

Alongside two other central defenders Luiz appears to be settled.

This could be because if he makes a mistake he still has two fellow central defenders to help him out, but also because it allows him to carry the ball out and pass it around, which is a key component of his game.

If they stick with this formation, one can only expect Luiz to get better and better.