World No. 1 Rafael Nadal beat his greatest rival Roger Federer 7-5, 6-3 at the ATP World Tour Finals on Sunday afternoon to reach his 14th final of the year.
He will next face Novak Djokovic or Stanislas Wawrinka, who are playing later tonight.
Nadal will attempt to become the third Spaniard to win the season-ending championship, the first since Alex Corretja in 1998. Manuel Orantes also won the title in 1976. He will try to become the first left-hander to win the season finale title since John McEnroe in 1984.