Create Design. Count the number of squares on your tennis racket. Mark a piece of graph paper with the same number of squares (Image 1). Plot out your design in the squares (Image 2). Using a marker, mark the parameters and design outline on the tennis racket squares (Image 3). (Don’t worry, the yarn will cover up the markings.)
https://www.hgtv.com/design/make-and-celebrate/handmade/embroidered-vintage-tennis-racket