I agree that we might need another top class CB soon, but I don't think that is to replace Luiz, rather to replace Terry. Chalobah right now is being moulded into a DM, same can be said for Ake. I don't think their long term future is at CB IMO. Still to this day, the CB pairing of Luiz and Terry at the start of the season has been the best by far. We haven't really had another chance to consistently see this partnership grow because of injuries mainly, so I think it's unfair to say we've had a long enough look at Luiz at CB. People forget that he's only 25 so as a CB he still has time to grow. Personally I look beyond the tag the media has given him as an erratic player - like I've said before, you don't start at CB for Brazil if you haven't got any sort of quality about you.