The Brazilian has featured just once in the Premier League this season, but was afforded the full 90 minutes as Chelsea advanced to the fourth round of the Capital One Cup with a 2-0 victory over Swindon Town.
Yet Luiz insists he has no fears regarding his stature in the squad as all selection decisions are down to the manager.
"It was just one game," told the Evening Standard. "Sometimes when other players go out of the team, people don’t say anything. I don’t need to prove anything. Everyone knows who David Luiz is, I want to play football and enjoy myself on the pitch so when I have an opportunity to play, I want to enjoy just that.
"I am just one player in the team. Sometimes the manager can put me in, sometimes not. It’s his choice."
Luiz is not the only Chelsea player to find himself more acquainted with the substitutes' bench, with Juan Mata and Fernando Torres also struggling for game time, but the defender feels it is just the cause of a competition squad.
"This is a big club and we have many, many good players," he added. "If Chelsea just had 11 players we would win nothing. We don’t have to prove anything. We just have to show we want to play. Everyone had an opportunity to play against Swindon and show our football.
"Last year you could talk about seven players being on the bench and the next year is the same. Mourinho chooses his 11 players to play, his philosophy and tries to do the best job for Chelsea. That for me is normal."