It was a definite penalty, doesn't matter how soft it is, if you would give a free kick for it then it should be given as a penalty. Just like last season with Zhirkov and Smalling, when we beat them 2-1, people said it wasn't a penalty but it was, it's soft but its a foul. People now days have it in there heads that you have to be injured in the box and there kegs brutally hacked for it to be a penalty, Luiz shouldn't if done it and hopefully he learns from it.