Whipping his racquet through the air like a cesta in jai alai, Rafael Nadal produces such tremendous topspin that the ball sometimes seems to catapult off the court, creating a shot as challenging ...

WSJ’s Daniela Hernandez explains what you can learn from the physics that give tennis pros their edge. Photo composite: Adele Morgan Home Browse Series Live Q&A WSJ Events From Sponsors WSJ.com ...

What are tennis balls made of? Modern tennis balls are made of a hollow rubber core, covered in a wool or nylon shell which is known as the nap. Pressurised air inside the rubber core makes the ball ...