For anyone who's interested, 15 year-old Emmanuelle Salas is an interesting player as she's always been in the French spotlight (she won the U-12 national championships) but she's not really in the system.

Her parents are both tennis monitors and they own a club in the middle of nowhere in the south of France. So she's very much a product of them (her dad claims that schlepping her to all the training centres would take way too long).
She's home-schooled (by correspondence) and her dad is full-time her coach.
They put huge emphasis on the pleasure of playing and the irrelevance of ranking (but the importance of winning) i.e. that playing a tournament to get points for a ranking is completely the wrong approach but playing a tournament to win it (or to get to a certain place, depending on the level) is what the aim should be.
They also are very against young players using racquets that are way too heavy for them - which lots of girls do because it gives them a more powerful shot. (Although she's grown a bit now, it's also true that Emmanuelle was a tiny, slender little girl). And also very against over-training. They are very concerned about long-term injuries.
Salas is supported by the Sport for Life foundation, as well as sponsored by a local consultant company, as well as Tecnifibre.