Roger Federer and Rafael Nadal will have history on their minds when they clash in the final of the ATP World Tour Finals on Monday morning.
For world number one Nadal, he is aiming for his first win in the year-end showcase at London's O2 Arena, while Federer wants to equal Pete Sampras and Ivan Lendl as the only men to win the event five times.
Federer has added motivation as he aims to beat the man who succeeded him as the world's number one player and who has won the last three Grand Slam tournaments.
"I'm really looking forward to playing against Rafa - who wouldn't? I'm no different," Federer said.
"What he's achieved is amazing at his age, to win the career Grand Slam, and he already has three in a row again on another great streak."
"He's obviously a wonderful player, he's proven himself he can play on any surface. The ones who still call him a clay-court expert, they still don't know much about tennis."
With Nadal holding a 14-7 career advantage against Federer, and having won their only meeting this year in Madrid on clay, the Swiss ace knows he will have to go for the jugular on Sunday.
"I'll try to take it to him, play aggressive, attack his second serve, see how it goes," Federer said.
Federer said he does not anticipate holding a fitness advantage over the 24-year-old Spaniard, despite Nadal being forced to two tie-breakers in a three-hour marathon against Andy Murray in Saturday's first semi-final.
"I don't think it's going to have much effect on him, to be honest. He's been done a few hours now, he might be tucked up in bed already while I'm still doing my press conference here," he said.
"That's his advantage, that he played early."
Nadal was more circumspect when quizzed about the effect his match with Murray might have on Sunday.
"I don't know what's going to happen tomorrow, how I'm going to feel," Nadal said. "You can imagine, right now I am very tired. That's the truth."
Counting against Nadal as he tries to win his first ATP World Tour Finals is his distaste for the indoor surface in London.
"The surface is not too slow, it's not too quick," Nadal said. "But here, when you play against the best players in the world, they are more specialists than me in these kinds of surfaces."
"I said before the tournament that here you don't have a big chance to defend if you are not playing very well, by playing higher balls to try and find a solution."
"The only way here is to play aggressive. You can play defensive for moments but you have to come back to the attack."