The Spanish tennis player David Ferrer has upset the home favourite Andy Murray 6-4 7-5 in his opening group match at the ATP World Tour Finals in London.
Britain's world number three broke serve first in both sets, but couldn't break the Spaniard's defences in a flat, error-strewn performance.
The world number one Novak Djokovic begins his campaign shortly against the Czech Tomas Berdych.
Rafa Nadal and Roger Federer both won their opening Group B matches yesterday.