And Djokovic is the only player left standing between Fed and this title. The two advanced to the finals with wins on Sunday.
Djokovic was the first to advance as he took down Juan Martin del Potro 4-6, 6-3, 6-2. Federer advanced by beating Andy Murray 7-6 (5), 6-2. Both players survived slow starts to cruise to fairly easy victories, but it was Federer who was the most impressive.
For starters, he had a tougher opponent in the defending U.S. Open and Olympic champion, Andy Murray. Since beating Murray in the Wimbledon finals earlier this year, Federer had lost two straight to Murray since. However, Federer is playing far too well right now for Murray to handle.
The Scot jumped to an early 3-1 lead in the first set as Federer struggled with his first serve. This is not surprising, as Fed's first serve is often a key indicator of his success.
So it should also come as no surprise that as Federer began to dial in his first serve, he began to take control of this match.
Federer wound up hitting on 54 percent of his first serves and he won 84 percent of those points. That number is still lower than the 63 percent mark he is hitting on first serves for the year.
Federer's first serve has been solid in this tournament, and it is safe to assume that serve will be solid against Djokovic, and with that, Djokovic will not be able to beat him.
These two have built up a nice rivalry, and while Djokovic won the first two head-to-head meetings this year, one of those was on clay, and Federer has gotten the better of Djokovic in the last two meetings which have come at Wimbledon and at Cincinnati—two surfaces where the play will more closely resemble the hardcourts of the O2 arena than the clay.
I expect both great champions to be playing at a high level as this is the last tournament of the year, and right now, Federer at his best is better than Djokovic at his best on the hardcourt.