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 ...

However, there are a few different theories: — Tennis scoring was "originally" kept on clock faces, with hands being placed at 15, 30 and 45 minute marks to keep score. The 45-minute mark was ...

In the thrilling world of professional tennis, where young stars constantly ... turning back the clock with resurgent performances that culminated in final appearances in Hong Kong and Brisbane ...