Alexander Zverev is convinced there was a defect in the electronic line calling system during his Madrid Open win on Sunday ...

Alexander Zverev's third-round match became controversial when he photographed a disputed ball mark, reigniting debates over ...

Top-seeded Alexander Zverev got a warning from the umpire for taking a photo of a ball mark during the clay-court Madrid Open ...

Sabalenka disagreed with a ball mark on the Stuttgart clay, a situation that electronic line calling would make even more ...

In many ball sports like golf, football and tennis, controlling the ball’s spin is an important skill. Expert players can make golf balls curve around obstacles, launch footballs towards goal ...

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 ...

Alexander Zverev is convinced there was a defect in the electronic line calling system during his Madrid Open win on Sunday ...