For the last couple of weeks, Andy Murray and Tomas Berdych have been on the same number of points in the ranking. Yet Murray is 5th and Berdych is 6th, rather than =5th. There must be some formulation whereby the ATP decides which one goes ahead of the other, but I can't see it in the Rankings FAQs. Is it based, for example, on who holds higher-ranked tournaments, so 1 GS would beat ... whatever it is Berdych has got at present, or what? Does anybody know?