In regards to your serve, variety is key. There is no use serving the same or similar serves around the same spot, same height and same speed. You can mix up your serves by changing the spin, height and pace. This serve has a lot of topspin on it which makes the serve slow and loopy, but it kicks up hard and fast off the court. As well as the kick serve you can utilize the slice and the flat serve. The slice serve is very effective when aimed right at the body, spinning in towards your opponent.