LONDON — Stanislas Wawrinka reached another milestone.

Having played the best tennis of his life over the past 10 months, the 28-year-old Swiss player made another statement by beating David Ferrer on Friday to reach the semifinals in his first appearance at the ATP World Tour Finals.

“It’s certainly a dream season,” the seventh-seeded Wawrinka said after rallying to beat David Ferrer 6-7 (3), 6-4, 6-1 in his final round-robin match. “I started as the world No. 17, I then reached my first quarters at the French Open, I made it to U.S. Open semis and I’m now doing well at the Finals. It’s magic.”

Wawrinka still had a nervous wait because he needed Rafael Nadal to beat Thomas Berdych in the late match in order to advance.