For every tennis player, the perfect serve is the holy grail. The serve is the most powerful shot in tennis, and the only one that the player has full control over. Great servers such as Pete ...

NEW YORK—For some in tennis, the serve clock was long awaited. For others, it was long dreaded. Not surprisingly, its introduction during the North American hard-court season this summer has ...

The second serve is not the first shot you think of when looking at a tennis player, but Alexander Zverev’s tremendous improvements on this critical shot have helped him ascend to the Top 10.