Mick I take your point, but in all honesty defensive organisation in open play and from set pieces is usually worked upon and honed tirelessly in training. Everything should really be in place on match day and the defensive unit should almost be able to work automaically. The coach/ manager would have worked through making his defence compact, dealing with the aerial threat of the opposition, whether they play a high line or play deep, whther a holding midfielder will pick up the forward who likes to drop into the hole or whther the centre back goes with him,whether defending on set pieces should be zonal or man for man. I agree an intelligent and vocal captain at centre back can offer tactical reminders to his fellow defenders during games should tiredness creep in and they switch off. But I don't think a captain should always be a centre half on this basis. John Terry is a good captain but Rio Ferdinand is not in his class in my opinion. Therefore Steven Gerrard would be the best option as he is a great captain for Liverpool.