I sensed for awhile that the latter half of the year was going to belong to Roger Federer so I'm not surprised that he went on and won the ATP Tour Finals.
He is playing exceptionally well and I am now confident he will be a consistent threat next season, even though I would still at this stage take Rafael Nadal to do better in 2011, unless he suffers injury.
Federer looks very nearly back to his best, I would not say he has rediscovered his absolute top level, but he is close enough to the frightening standard he has produced in the past to worry any player.
There were doubts three or four months whether he could keep up with Nadal but he has answered those questions - so really well done to him - and it is fantastic for tennis to see him back winning big prizes again.
Certainly the introduction of Paul Annacone as his new coach is a factor. Roger was very careful when it came to picking a coach and in Annacone he seems to have found the right man. A new input can make a big difference.
When it came to Federer the big question for me was always motivation, but he has answered that by showing he is still hungry for titles.
He has been overtaken by Rafa in the last year or so - there is no doubt about that - but he is now starting to narrow the gap again, and while I would still have Rafa as the favourite for the Australian Open, Roger is now right behind him. It is great to see the rivalry is back big time.
In my opinion, the main reason why Federer is still playing at such a high level despite the fact that he is now 29-years-old is because he needs to keep working on his game to keep up with Nadal.
If Nadal never existed, I've no doubt that Roger would still be playing tennis but not to the standard we are seeing at the moment because really he wouldn't need to.
Federer would still (and could still) win two or three Grand Slams a year as a gimmie if it wasn't for the challenge of Nadal.
Looking at Andy Murray's tournament - well he had another great match with Nadal but again he lost and there is the worry that Nadal could become a psychological stumbling block for him.
He was saying one or two strange things before the Rafa match. Talking about how tough it would be etc...
The strange thing about Murray is that some of the best tennis I have ever seen him play has been against Nadal but he has still ended up losing.
He has to break the habit of losing to the 'big two' in Grand Slams for it to stop being a problem.
I'm not sure he goes into Grand Slam matches against Rafa believing he can win, I do believe he goes into matches again Roger thinking he can win (he's just not doing it), but I think he still sees Rafa as the man he needs to overcome.