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In the League Cup defeat to Sunderland, one David Luiz moment summed up why he will never be a world-class defender at Chelsea for multiple seasons.
For whatever reason, once he puts on a Chelsea shirt, he is devoid of positional ability.
With Mark Schwarzer out of position, Luiz was on the near-post anticipating a shot from the right-footed Fabio Borini, who was shooting on a right angle.
The only way the ball was going to find the back of the net was through a gap.
Lo and behold, Luiz had his angles all wrong and kept his legs wide open.
Borini scores and Sunderland are back in the game. (They would later win it in extra time via Ki Sung-Yueng.)
Mistakes like this happens all the time with Luiz.
What makes the deal even worse is that Nemanja Matic is now worth more than £20 million.
So essentially, Chelsea paid Benfica around £41.3 million for a frustratingly inconsistent centre-back.