Celtic boss Brendan Rodgers has a wealth of experience in the dugout and has been there and seen most of what management at the elite level entails. Before he returned to Parkhead, Ange Postecoglou was in charge and created mass intrigue due to his unique style of football. Both men are shining examples of the heights you can get to by having an unwavering belief in their chosen tactical framework. One man who has worked under the pair is former Celtic assistant Chris Davies, firstly with Rodgers at Celtic and then alongside Postecoglou at Tottenham Hotspur, playing a major role in implementin…