Highs and Lows of David Luiz's Chelsea Career
Since then, Luiz hasn't been far from the headlines, with his display against Germany in Brazil's 7-1 thrashing in the World Cup semi-final seeing him picked out for some heavy criticism.
Luiz will be used to it, though, having rarely been far from the media spotlight during his three-and-a-half year spell in England.
He often dazzled, giving crowds incredible highs and lows that ensured there was never a dull moment when he was on the pitch.
Now that the World Cup is over and Luiz will soon be pitching up in Ligue 1, Bleacher Report looks back at some of his best and worst moments in a Chelsea shirt.
Winning the Champions League
Had Brazil lifted the World Cup this summer, it would have been the proudest moment in David Luiz's distinguished career.
For now, though, he will have to settle for the Champions League.
Luiz was an influential part of the Chelsea team that went on to lift club football's greatest prize in 2012, forming an unlikely partnership with Gary Cahill at the heart of defence.
John Terry was suspended for the final, leaving Luiz and Cahill to deputise in his absence.
They proved a strong partnership against Bayern Munich, with Luiz in particular putting in one of his finest displays for Chelsea.
Shoulder Charge on Brentford's Jake Reeves in FA Cup Clash
Chelsea were marching on their way to an FA Cup fourth-round replay victory against Brentford in January 2013 when David Luiz saw the red mist, shoulder-charging the Bees' Jake Reeves on the halfway line.
Fortunately for Chelsea's Brazilian defender, the severity of the incident went unnoticed by the referee, yet TV replays showed how horrific the challenge was.
Luiz escaped with a yellow card, but in hindsight, it should have been a lot worse.
Reeves had long released possession to a teammate, but Luiz still collided heavily with him, knocking the Brentford player to the floor.
Struggling to continue, Reeves was soon substituted.
You can view the incident on YouTube.
THAT Goal Against Manchester United
Talk about marking your arrival at a new club.
Chelsea endured a topsy-turvy 2010/11 campaign, but one major positive for supporters was the arrival of Fernando Torres and David Luiz in January of that season.
Torres may have struggled for goals, but Luiz certainly lit up the remainder of the campaign with his swashbuckling displays.
Among the high points was his first-ever Chelsea goal, coming in a 2-1 victory over Manchester United.
Wayne Rooney had put United ahead, but Luiz pulled the Blues level with a well-taken effort shortly after the interval.
Any striker would have been proud of it, but given Luiz is apparently a defender, it made his goal all the more remarkable, demonstrating poise and excellent technique to bury his shot into the bottom corner.
The goal can be viewed on YouTube.
Play Acts to Get Rafael Sent off
When Chelsea travelled to Old Trafford in the latter stages of 2012/13, Manchester United had already sealed the Premier League title.
The Blues were battling for a Champions League spot and secured a vital 1-0 victory courtesy of Juan Mata's strike.
It was a brilliant win for Rafa Benitez and his side, although the afternoon was marred by David Luiz's apparent play acting late on.
Challenged by Rafael, Luiz remained on the floor injured, leaving the referee to give the United right-back his marching orders.
As video replays showed, things weren't as they seemed, with Luiz playing the role of the victim perfectly.
Watch the clip on YouTube.
Wins the Europa League
Chelsea crashed out of the Champions League in the 2012/13 group stage, meaning they became the first champions to exit the competition so early in their defence of the title.
The Blues made the best of a bad situation, however, going on to win the Europa League.
Similar to a year earlier in the Champions League final, John Terry missed out—this time through injury—but Luiz was on hand for another solid performance to help deny his former club Benfica as Chelsea won 2-1 and lifted the trophy.
Scores an Own Goal Against Paris Saint-Germain in the Champions League
Chelsea had to pull out all the stops to get past Paris Saint-Germain in the Champions League quarter-final last term.
They had looked in control in the first leg against the eventual Ligue 1 champions, but things took a turn for the worse after the interval.
David Luiz not only gave away a poor free-kick, but was also on hand to convert it into his own net.
That put PSG 2-1 up on the night before Javier Pastore's last-minute goal made it 3-1.
On a dramatic night at Stamford Bridge, Chelsea won the second leg 2-0 to advance, with Luiz feeling incredibly relieved after his poor display in Paris almost saw Chelsea pay the ultimate price.
The Parisians clearly liked what they saw, though, splashing out £50 million for his signature just a couple of months later.
Garry Hayes is Bleacher Report's lead Chelsea correspondent. Follow him on Twitter @garryhayes