Roger Federer and Novak Djokovic are both looking forward to their last showdown of the season at London's O2 Arena this evening.
The world's top two players will compete for the Barclays ATP World Tour Finals crown after Federer defeated Andy Murray in the semi-finals on Sunday and Djokovic saw off Juan Martin Del Potro.
Federer is aiming to make it a hat-trick of titles in the final tournament of the regular season and the Swiss also holds a 16-12 advantage in his meetings with the Serb.
He said: "I love playing against Novak. He's had a great year. He's had a great tournament so far.
"I think for both of us it's pretty straightforward. We've got to press out the last juice that's left in our body and make it a successful year end, even though it's been successful for everybody who has been taking part in this tournament.
"But it is a big opportunity playing the last match of the season and facing off against Novak obviously is always special, especially here at the World Tour Finals."
World No 1 Djokovic said: "I'm really looking forward to it. It's already a great success but knowing it's the last match of the season, I'm really going to try to give my best physically and mentally to try to get the trophy.
"It's going to be very open. I think there are not really any predictions about who's going to win. Very few points will decide the winner."