I have some problems on holding my double bend structure during contact. When I hit well I feel that I'm keeping elbow in and I'm pushing in front whit him, and my hand remains almost over racquet head at impact. Rather when I swing with racquet head, my hand rotate and racquet head lead the stroke. It seems to me that when I bring my palm toward right side at contact, I mantain double bend and I can hit through the ball. Do you have any tips for don't rotate hand at impact and keep racquet head horizontal until after contact?