Roger Federer has had question marks hanging over him since the day he was blown out of the French Open and Wimbledon took over the limelight. He is definitely one of the best grass court players that ever lived, but does the Swiss master still have it in him to surpass Bjorn Borg's record of five consecutive wins at Wimbledon?

It would be an amazing feat if he were to achieve it, but it is the toughest year this year. Why do I say that? Because of one man: Rafael Nadal. The Spaniard has gone from good to great to flawless in an amazingly short space of time. He has been the greatest example of fitness and discipline and professionalism to the sport.

He was already dominant on clay and needed something special to start winning on grass. He surely didn't want to be another champion who would be known as the clay-court specialist and that's where one has to give full credit to his great ability to adapt.

The new Nadal at Wimbledon hits the big serve and runs to the net to kill the point with a volley. Yes people, Nadal has started serve and volley - the most successful technique on grass which Borg, Jimmy Connors, Pete Sampras, John McEnroe and Goran Ivanisevic all used to deadly effect. Nadal has picked up this missing element from last year and he now looks invincible. The ground strokes are still there, as powerful and accurate as ever. He has no chink in his armour today.

No matter how good Federer has looked in his run so far, there is nothing different about him. He has had his fitness issues at the start of the year and it will a big surprise for me if he actually wins it again. Nadal is a machine right now and if they meet in the final - which is highly likely - Nadal will certainly be ready for it.

This by far been the greatest rivalry in the recent history of sport - and not just in tennis. Whereas Marat Safin has been a surprise and could possibly be the dark horse to spoil the party, I just don't see it happening.