Coaches must work with their captains form The Hindu

"Captains must concentrate on leading their players on and off the field. Their task is to build an enduring spirit and a side that plays to the best of its ability. Naturally their opinions on matters of selection will be considered, not least to avoid them walking into the rooms before a Test match and growling, as Archie Maclaren once did, "Oh, Lord, see what they've sent me this time!"
A captain, though is not appointed for life. He serves at the pleasure of his Board. Sport is for young men. Dictators may remain in power till their last breath. Cricket captains are sacked when confidence is lost.
Coaches must work with their captain. They can assist players, suggest tactics, spot weaknesses in opponents and develop the sort of strategies that helped England to regain the Ashes. They cannot expect to transform a side in a month. Nor they ought to challenge the captain. They belong in the rooms but must speak with authority. Obviously captain and coach must work together. If they cannot, one must be replaced, or both. A wise coach will bide his time."