Roger Federer -Novak Djokovic

Roger Federer -Novak Djokovic :Djokovic N. +5.5% [1st Serve %] @1.90 gamebookers

Another statistical based bet, involving the first serve percentage. Made some research in this field, and found out that Federer defeated Djokovic in this sector of the game , only once in their 6 encounters (the last one, Us open 2007).Other games look like this 67-65 ( ATP Masters Series Canada),62-64 (Dubai) , 62-61 (Australian Open) 53-64 (ATP Masters Series Monte Carlo).
I've observed how they performed until this stage of the competition , and even if they had no problems winning their matches(except Federer with Tipsarevic), their first serve percentage was always somewhere between 60-65 % percent.
I expekt a well balanced game, and even if Federer is more reliable on serve , the difference should not be more than 5 % in his favour. The odds are good, so I will take
Djokovic N. +5.5% [1st Serve %] @1.90 gamebookers