Kei Nishikori suffered a quarterfinal loss against Germany's Alexander Zverev on Friday and crashed out of the Citi Open.
Nishikori, the seventh seed and 2015 champion, was handed a 3-6, 6-1, 6-4 loss by the world No. 3 Zverev at Rock Creek Park Tennis Center, falling in a third set that had been delayed by rain for nearly 2½ hours.
The 28-year-old powered through the first set, breaking the German's serve once and saving two break points. But Nishikori lost momentum in the second as Zverev leaned on his serve, blasting six aces on the way to winning 87 percent of points on first serve.