Device adapted at training of tennis ball impact accuracy after serving or a stroke located at the playing area

摘要

The device consists of a stable aid (1) equipped with an auxiliary area (1.3) lain in a vertical plane (4) touched a border of determined target (2) and oriented against direction of tennis ball movement and minimum its contour is contrast with a background of a stable aid (1) or with the playing area (3) and/or with a net.