NEW YORK — Fabio Fognini, the newly minted husband of Flavia Pennetta (who happens to be the 2015 US Open champion), has been causing scenes in New York—and he's only played one match.

When you have the chance to snag Fabio Fognini as the face of your underwear line, you don't hesitate. The 31-year-old stripped down for Emporio Armani, an Italian designer clothing company ...