Julian Green will not be on the U.S. national team's squad at next month's CONCACAF Gold Cup, with U.S. coach Jurgen Klinsmann saying on Tuesday that the 20-year-old needs some time off after a difficult season at Hamburg.

"He had that extreme, long year," Klinsmann said from Cologne, where the U.S. will meet world champions Germany on Wednesday in a friendly. "He needs a break now, so we leave him out of the Gold Cup."

Green was a controversial selection to Klinsmann's squad for last summer's World Cup. But while the German-American, who had only played a handful of minutes for club team Bayern Munich during the 2013-14 season, scored a memorable goal in extra time of the Americans' round of 16 loss to Belgium in his lone appearance, 2014-15 was a step backwards for the youngster.