Japan's Kei Nishikori secured a spot in the third round of the U.S. Open when French tennis ace Gael Monfils retired with an injury in the second set of their men's singles second-round match on Thursday.World No. 19 Nishikori was leading 6-2, 5-4 when his 39th-ranked opponent and 2016 U.S. Open semifinalist stopped night-session play at Louis Armstrong Stadium because of an injured right wrist.Monfils resumed play after Nishikori's reflex volley hit his wrist and he called for a trainer, but eventually retired after dropping serve in the ninth game."I feel bad about Monfils' retirement," 2…READ FULL ARTICLE
