LONDON, Nov. 21 (UPI) -- Andy Murray of Scotland and Swiss superstar Roger Federer registered wins Sunday to kick off Group B play at the ATP World Tour Final in London.
Murray downed Sweden's Robin Soderling 6-2, 6-4 in a match that lasted 80 minutes at London's O2 Arena, firing 10 aces past the Swede.
And Federer, who has won the London event four times, cruised past Spain's David Ferrer 6-1, 6-4 in Sunday's second match, taking advantage of the Spaniard's six double-faults.
Sunday's matches began the first six days of round-robin play at the event. The top two finishers from Groups A and B will gain the semifinals with the final to be played Nov. 28, ending the ATP season.
Group A features world No. 1 Rafael Nadal, U.S. Open runner-up Novak Djokovic, Wimbledon runner-up Tomas Berdych and Andy Roddick.
