MIAMI, Fla.—The urge to find the "magic bullet" isn't exclusive to tennis players, although something about the process is especially appealing—and suited to—the profession. After all, there's only so ...

The 1821 opera Der Freichütz (the Freeshooter), by Weber, is considered the first romantic German opera. Much of its plot is focused on the production and use of magic bullets which, when fired, ...