Thanks for the work. Here are the best years of Rafa on clay statistically then,
Taking off quotes so that the data will show:
1. 2012 - 89% Service Games Won, 47% Return Games Won = 136
2. 2008 - 84% Service Games Won, 51% Return Games Won = 135
3. 2007 - 87% Service Games Won, 45% Return Games Won = 132
3. 2010 - 91% Service Games Won, 41% Return Games Won = 132
5. 2005 - 84% Service Games Won, 46% Return Games Won = 130
6. 2009 - 85% Service Games Won, 43% Return Games Won = 128
7. 2011 - 83% Service Games Won, 44% Return Games Won = 127
7. 2014 - 83% Service Games Won, 44% Return Games Won = 127
9. 2013 - 87% Service Games Won, 38% Return Games Won = 125
10. 2006 - 84% Service Games Won, 40% Return Games Won = 124
Now, the same thing, but ordered by returns, not totals:
2. 2008 - 84% Service Games Won, 51% Return Games Won = 135
1. 2012 - 89% Service Games Won, 47% Return Games Won = 136
3. 2007 - 87% Service Games Won, 45% Return Games Won = 132
5. 2005 - 84% Service Games Won, 46% Return Games Won = 130
6. 2009 - 85% Service Games Won, 43% Return Games Won = 128
7. 2011 - 83% Service Games Won, 44% Return Games Won = 127
7. 2014 - 83% Service Games Won, 44% Return Games Won = 127
3. 2010 - 91% Service Games Won, 41% Return Games Won = 132
10. 2006 - 84% Service Games Won, 40% Return Games Won = 124
9. 2013 - 87% Service Games Won, 38% Return Games Won = 125
It's hard to see usual trends in Rafa's game because it is so up and down due to injuries. Fed has had a small improvement during his career in service games but has dropped in return games. 2012 is hard to explain. Second best year ever for returns, second best year for serving. It looked like everything was working, then suddenly he was gone for 7 months
In general Rafa's serve has improved, peaking in 2010. Then after that I have to wonder if he was starting to have back problems, earlier than he admitted having them, because his serve has fallen off so much since 2012.