So, my first and second serves always spin in, and I had a lesson last week to help me learn to hit a flat first serve. Despite practicing it almost every day since the lesson, I'm still spinning virtually every serve I hit. I would really appreciate any suggestions on how to correct my spinniness (and anything else that looks suspect, of course). A link to a video of my serving practice from this morning, which involved some deliberate spin serves on my part, is below: The video is shot half at a distance to show ball placement and half closer to show my service motion. Thanks very much in advance!