Defending champion Roger Federer will face Jo-Wilfried Tsonga in the final of the ATP World Tour tennis finals.
The Swiss great overcame some dogged resistance by Spain's David Ferrer, winning 7-5 6-3 at the O2 Arena to book his place while in the other semi-final the French powerhouse beat Czech Tomas Berdych 6-3 7-5.
Should Federer win the title he would pocket the $2.2 million jackpot for an undefeated champion.
Victory also meant that Federer will end the year as world number three, moving back above Britain's Andy Murray who withdrew from the tournament with a groin strain.
