Prêt à Sporter

Ever since Suzanne Lenglen breezed to victory in a headband and short-sleeved dress in 1919, Wimbledon has been a showcase for style. This year, it's the on-court officials' turn to wow the crowds. For the first time in Wimbledon's 129-year history, the All England Club has broken with tradition and invited a big-name designer to dress up the umpires, line judges and "ball kids." That imported Americanism — the traditional English terms remain ball boys and ball girls — is apt, since the sponsorship deal, worth an estimated $10 million over five years, was awarded to Polo Ralph Lauren, America's favorite...