Originally Posted by toly
BTW there is no waiter’s tray at all, see frames #1 and #2, so it isn’t the problem.
Image #1 shows he's in a waiter's tray position.
edit: the pro pic you posted is a kick serve
and not a slice serve. different mechanics. different contact postion. different amount and timing of pronation, different swing path, different body position. not applicable to this discussion.