After becoming football's first ever £100 million defender on transfer deadline day, David Luiz has a massive point to prove at Chelsea.
Relief was the unanimous feeling amongst fans when the Brazilian was shipped to Paris Saint-Germain for £50 million in 2014 yet here he is, about to embark upon his second stint at Stamford Bridge.
The odds are stacked against him to dispel the belief that he's a liability, especially so considering the sheer amount of costly errors he's made throughout his career.
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Indeed, against Barcelona in 2015, Luiz was made a laughing stock by Luis Suarez when he was nutmegged twice by the Uruguayan, who then found the back of the net on both occasions.
Despite his chequered past, the 29-year-old still has the faith of manager Antonio Conte.
But not just any faith - no, Conte believes Luiz can become one of the world's best centre-backs at Chelsea.
According to the Guardian, he said: "This transfer window was very difficult for us to reach our targets.
"At the last minute there was a situation which the club and I agreed on to improve the squad [the signing of David Luiz]. I like defenders who like to play football.
"We know that David can improve in certain defensive situations, but I'm very happy that he is here. He's also a good guy, a positive person in the changing room."
It was at this moment Conte said something he could well be ridiculed for in the future.
"Every player, until the end of their career, can improve," the Italian added. "Every player. Even when you are 32, 33 or 36, you can always improve.
"David Luiz is 29, a fantastic age for him to become one of the best defenders in the world. I'm seeing great commitment from him; he wants to play for Chelsea.
"This is a great opportunity for him and for us to improve. I repeat: he has good characteristics to become a fantastic defender in the world."
Why Conte saw it necessary to reiterate his belief that Luiz can become one of the world's best is a mystery.
What's certain is the former Juventus manager holds the Brazil international in high esteem - and the feeling's mutual, apparently.
In an interview with ChelseaTV, during which he committed himself to playing anywhere he's asked at the club, Luiz hailed Conte as "amazing".
He said: "I started playing three at the back with Vitoria in Brazil, but it doesn’t matter where, I want to help and when I am in the team I am there to try to help.
"The coach is an amazing coach, he understands a lot of tactical things and I know he chooses every match the best line up.
"If he needs to play three, four or two, it doesn't matter, I am there if he wants me to play. In different positions I am available."