I'm a few days back from my break in tennis and I'm realizing that my ball sense and my coordination is off. I hit the ball in the outside of my racket's sweet spot and that creates a loss of control. And I'm watching the ball too. Also, I find it annoying that the ball sometimes bounces weirdly and I hit a waist-high stroke at shoulder level. I'm like "Omg, omg, I can totally hit this ball, " and then it just bounces abnormally and causes me great loss (of points). Also, can anyone provide tips for hitting a slice at shoulder-level? I try to hit it down and not make it float...but then it hits the net tape. How does Federer do it?