A further comment I notice that Andy is now 900 points ahead of Federer
Andy being 8660 to Federer's 7760 on the live-tennis.eu site Please could someone explain how that can happen?
On the live ranking page they take off points from last year at the start of the tournament, then add any gained this year after each match.
In the official ATP rankings they come off after the full year, so usually at the end of the tournament, and are replaced by this year's points. They are updated most Mondays.
Hope that makes sense!