India, May 22 -- Among all the enterprising and left-field faces to have sat in the coaching box of Novak Djokovic - and it's a rich spread - Andy Murray's stint was the shortest. Yet not quite the sweetest.

The Serb, through his career of going from a temperamental young talent to a certified great stamped by 24 Grand Slams, has made some surprising choice of coaches. Right from Boris Becker and Goran Ivanisevic and Radek Stepanek to, more unofficially, Andre Agassi. Even by those standards, Murray was a shock.

It ignited a spark in Djokovic at this Australian Open where he reached the semi-finals, before fizzling out to a split days before the French Open. Djokovic said he "couldn't get more" out of the partnership that only lasted si...