to serena andds williams, the two williams sisters,, different did it make that they had a father that obsessed with the game as they were, and a mother. katrina: we have always had obsessive parents in the game, -- charlie: is it good? katrina: it depends on their approach. what works for the williams sisters may not work for someone else. we embrace any parent that wants to be in the sport and have their kids in the sport. we want to make sure that the child is protected, if you will, and making sure they have the right guidance and support behind them so they are not overworked. charlie: you start very early playing tennis even at the competitive level? katrina: we have 10 and under, that's true. what we have taken the ranking out of it. youths aremes when gunning to be number one, they don't focus on developing. they focus on ranking. and that is something we try to promote throughout our game, particularly through development, making sure the players and coaches understand that the development part is the most important part. the rankings and success will come. if you focus on win