Well, since Steffi herself said, after the 1999 Wimbledon QF, that when Venus' serve was working playing her was 'very difficult', I'd go with Venus. At least we know Steffi HAD trouble with her. In fact, Venus had beatenher twice that year before Wimby.
Of course, this was neither Venus' prime nor Steffi's.
Proud to be an American
Not blind. Not uninformed. We are party to atrocities. But the response of the world after 9/11 is worth noting. Even our most dire enemies offered aid. We should all be so lucky.