Should he win, Federer will have won 70 of his 100 finals in a career spanning back to 1998. On Saturday the 16-time Grand Slam champion beat Spain's David Ferrer 7-5 6-3 in a semi-final match lasting only 85 minutes. It means the ATP world ranked number four will leapfrog Scotsman, Andy Murray
into third spot.
Murray recently was forced to pull out of the ATP World Tour Finals with a groin injury. Despite winning five titles in 2011, Murray has stressed his need to rest following a gruelling year in which he played 69 matches, winning 56 of them. Murray told the BBC
This is one of the best tournaments in the year, one that me and all of the players look forward to playing. I couldn't give anywhere near my best and that's what was disappointing.
But for Jo-Wilfried Tsonga, who beat Tomas Berdych 6-3 7-5 in the second semi-final. He was upbeat about his chances of taking on the 30-year-old Swiss on Sunday. He said:
Roger is the best player at the moment but I can do it. I expect to win.
Few tennis fans could forget how Tsonga beat Federer
at this year's Wimbledon Finals, in what was an amazing comeback win, from two sets down in the quarter finals. Although that thrilling match may well be fresh in the memories of many, the pairing have met four times since then, with the 27-year old Frenchman losing the last three. Tsonga is ranked at number six in the ATP rankings
. The pair will face each other at 1730 GMT (1230 EDT) at London's O2 Arena. You can follow live updates from the clash at London's O2 Arena here