This one has probably been debated many times in one form or another, but its a good debate. Assuming Serena at her best was probably the best womans player(hardest hitting, at least), what level of men's player would she consistently beat? Lower ranked touring pros? Satellite level guys? I've spoken to guys who say good div 1 men would beat the top women. Lets assume a 3 set match, so conditioning isn't really an issue.