(Corrects to eighth final in first par)
NEW YORK, Sept 7 (Reuters) - A ruthless Novak Djokovic beat Kei Nishikori 6-3 6-4 6-2 at the U.S. Open on Friday to reach his eighth final at Flushing Meadows, where he will face Juan Martin del Potro.
Djokovic, this year’s Wimbledon champion, kept Nishikori under relentless pressure, carving out 17 break point opportunities and winning 80 percent of his own first serve points to win in two hours and 23 minutes.
The 31-year-old Serb, who was beaten by Nishikori at Flushing Meadows in 2014, improved his head-to-head record against the Japanese to 15 wins from 17 meetings.
Del Potro won the first semi-final earlier in the day after defending champion Rafa Nadal retired with a knee injury. (Reporting by Simon Jennings; Editing by Peter Rutherford )