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Old 01-27-2013, 09:14 PM   #212
krosero
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Join Date: Dec 2006
Posts: 5,130
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2007 AO
Federer - 25.4%
Djokovic - 9.4%

2008 AO
Djokovic - 24.3%
Federer - 18.0%

2011 AO
Djokovic - 17.4%
Federer - 13.9%

In 2008 they made the switch from Rebound Ace to Plexicushion. I am not sure but I have heard that Plexicushion is slower.

The AM's in '11 are lower than in '08, which is one piece of evidence that the Plexicushion itself was slowed down during the intervening years.
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