There was a research done by nobel prize winner Daniel Kahneman that could be used to answer JLH's question, "Why would Rafa want Ferrer to do well if that means he'd overtake him in the rankings?"
Basically it shows that some of the basic principles of economics, such as involved parties always pursuing their best interests, are actually not always true if
the parties are human
I really believe that people are egoistic, egotistic and naturally evil
It's the culture that makes them (us) coexist in relative order.