There are new faces at the year-end ATP championship, but Novak Djokovic comes to London on a roll and is looking to hold on to the world No. 1 ranking.
Remember back in the day when we thought Roger Federer was washed up? Silly us. Suddenly, he's the player to beat on tour ... again.
Roger Federer really wanted to play Rafael Nadal in Australia. He probably doesn't have that hankering anymore.
The last time Roger Federer won any title, Novak Djokovic was still a mere mortal. How things have changed.