William Gallas burnt his bridges at Chelsea but he was the best centre-back under José Mourinho.
Gallas could predict the runs of opposing forwards and could intercept the ball at will.
What irked him the most was that Mourinho didn't appreciate this and would often play the Frenchman out of position.
Mind you, Gallas giving 70 percent effort at left-back was still better than Asier del Horno giving it his all.
Ricardo Carvalho was a good centre-back but he wasn't on the level of Gallas, who was world-class.
Gallas perhaps felt Mourinho was biased towards Carvalho which led to the Frenchman's toxic relationship with the Special One.
Arsène Wenger's biggest mistake in recent memory was making Gallas the captain of Arsenal.
If you look at Gallas' upbringing, you can identify reasons why he became such a demonstrative and insensitive captain.
His former teammate Jérôme Rothen revealed that Gallas was bullied during his time at Caen because he was one of the worst players at the club.
I used to catch sliding doors full in the face at airports or, when there was a hole in the pavement, the only one to fall flat on his face was me.
People did not see me doing anything. I must have surprised a few at the school.
Not a lot of people saw me turning pro at the time. There was only one thing to do and that was work and keep working. No doubt I was more persistent than others more gifted.
One day, when I was 16, Francisco Filho, one of the coaches who is now working with Manchester United, told me: 'William, as an attacker, you don't score goals. In midfield, you don't make any, so we are going to try you in defence'. He was right. He wasn't being nasty.
Regarding Gallas' time at Arsenal, I'll remember two things: 1) breaking up the dressing room and 2) losing the plot against Birmingham City.