8 November 2012 Last updated at 17:00

Federer "thrilled" to qualify for the semi-finals

Roger Federer says he is "thrilled and relieved" to qualify for the semi-finals of the ATP World Tour Finals at London's O2 Arena after beating David Ferrer.

Federer, who now has a 14-0 record over Ferrer, commends the skill and sportsmanship of the Spaniard following the 6-4 7-6 (7-5) victory, describing him as "a great guy and a great player".

Federer says that despite having already qualified, he will still try his very best to win his next round robin match against Juan Martin del Potro on Saturday.

Available to UK users only.