Eight-time Dubai Duty Free Tennis Championships winner Roger Federer is through to the semi-finals of the ATP Finals.
He beat Novak Djokovic in a pulsating round-robin encounter at the O2 Arena in London on Thursday night.
The 6-4, 6-3 win means that the Serb is now eliminated from the season-ending tournament.
It also means that Rafael Nadal will finish the year as the top-ranked male tennis player in the world.


Desert Vipers seal first DP World ILT20 crown after victory over MI Emirates
Cameroon through to take on Morocco in Cup of Nations
Bangladesh will not play T20 World Cup matches in India over 'players' safety'
Root-Brook stand lifts England before weather intervenes in final Ashes Test
Raducanu pulls out of Osaka tie at United Cup as fitness concerns resurface
