29 November,2011 09:08 AM IST | | IANS
Sunday's World Tour Finals triumph catapulted Swiss ace Roger Federer to third position in world rankings while Britain's Andy Murray dropped one place to fourth.
Federer is closing in on the beleaguered Spaniard Rafael Nadal who failed to manage a semi-final berth in London.
Serbian Novak Djokovic still holds a big lead over second-placed Nadal with 13,675 points.
