I've never thought about this until now but does a particular player attract fans that have similar personalities to them? In other words, do fans behave like their idols? For example:
Maria Sharapova: fans seemed to be the younger bunch, girly, childish, bitchy
Serena: fans with strong personality, obnoxious, tend to make alot of excuses, controlling, wild.
Venus: fans are those who are more mature, reasonable, respectful, more layback
Lindsay: very similiar to Venus fans accept with occasional sarcasm that's subtle but effective
Elena D: fans are sarcastic, funny, not too serious, doesn't have a lot of confident
Justine: fans are boring, down low, quiet, not flashy
Hingis: fans are clever, confident, sarcastic, tend to make bold statements, likes to talk trash.
This is just my analogy, don't take it too seriously