is there any coach willing to assess my son to be at Green ball level? My son has been playing on yellow balls for years but he's only 8.5yo. He tried out orange ball and hated it, it's not going anywhere. USTA decides that he has to play orange ball. Can someone help assess him to green ball level (I can send videos or live) so he can actually play in a somewhat normal tournament? I tried to find a local coach but no luck. Worse case, we have to wait until he turns 9 but that is still a long way away.