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

Instead, the German got his phone out of his bag and took a photo of the mark, delaying Davidovich Fokina's service motion.

Supporters of both sports now assert that their game represents the future of racquet sports, and they are competing for both ...

Alexander Zverev was slapped with a code violation during his third-round match at the Madrid Open. Automatic line calling is in use at the Masters 1000 event, meaning umpires can no longer come to ...