Andy Murray began his ATP World Tour Finals campaign with a convincing win over Spain's David Ferrer in London.


The Briton, 28, won 6-4 6-4 at the O2 Arena and will next play the winner of the evening match between Stan Wawrinka and Rafael Nadal.


Another victory on Wednesday would ensure Murray ends the year as world number two for the first time.


The Scot's season will continue next week as Great Britain take on Belgium in the Davis Cup final.


"It was a tough match with a lot of long rallies," said Murray. "He fought hard right to the end and made it extremely difficult.


"He didn't serve as well as he can and I played a bit better at the end of both sets, and that got me the win."