Nishikori beats Wawrinka in straight sets at ATP finals
LONDON — For the first time, Stan Wawrinka lost a match at the ATP finals to someone who hasn’t been ranked No. 1 in the world.
The U.S. Open champion, who has reached the semifinals of the season-ending tournament for the last three years, lost his opening match Monday at the O2 Arena to Kei Nishikori 6-2, 6-3.
Wawrinka holds a 6-7 record at the tournament for the top eight players in the world, but his previous six losses were against Roger Federer, Rafael Nadal and Novak Djokovic — twice to each.