![Marathon match: Andy Murray.](/web/20161120042953im_/http://www.smh.com.au/content/dam/images/g/s/t/a/h/p/image.related.wideLandscape.460x259.gst95r.png/1479606984262.jpg)
Murray and Djokovic duel for year-end championship and world No.1
In wildly differing circumstances, Andy Murray and Novak Djokovic have arrived at the first championship match in the 27-year history of the season-ending tournament that will decide which man finishes the year at No.1.