Iga Swiatek is the youngest woman since Serena Williams to own Grand Slam titles on all three surfaces after becoming Wimbledon's champion.

LONDON—For weeks while back home in Warsaw last year, Iga Swiatek hung out with friends and made new ones, but didn’t dare tell them about a doping case that was hanging over her. “Obviously, in the back of my mind,

Swiatek may not have completed a French Open four-peat but she is now on the verge of becoming a Wimbledon champion. Over the past fortnight, the 24-year-old has dropped only one set in six matches played at The Championships and she enters as the favorite to beat Amanda Anisimova in the title match.