ANDY MURRAY’S stellar summer came to an untimely end Wednesday, as Kei Nishikori outlasted the world No. 2 in a five-set U.S. Open quarterfinal showdown at Arthur Ashe Stadium.

    Whether or not chair umpire Marija Cicak’s let ruling was the reason that Nishikori wound up coming back to win 1-6, 6-4, 4-6, 6-1, 7-5 Wednesday, it surely will be what’s most remembered about the back-and-forth, 4-hour match.

    After all, Murray’s extended discussions with Cicak and another official about the unusual episode came during a stretch in which he dropped 12 of 14 points.

    He went from a lead of two sets to one, plus a break point at 1-all, to ceding the fourth set and trailing 2-0 in the fifth.

    “I could have won the match for sure,” said Murray, the No. 2 seed and 2012 champion at Flushing Meadows.

    The No. 6 seed Nishikori reached a Grand Slam semifinal for the first time since he was the U.S. Open runner-up two years ago. He faces No. 3 seed Stan Wawrinka, who ended the resurgent run of 2009 champion Juan Martin del Potro 7-6 (5), 4-6, 6-3, 6-2 in a quarterfinal that finished past 1 a.m. Thursday. The other men’s semifinal Friday is No. 1 Novak Djokovic against No. 10 Gael Monfils.

    The last game of two-time major title winner Wawrinka’s victory was delayed while the crowd saluted the popular del Potro, who missed the U.S. Open the past two years because of three operations on his left wrist. As fans stood and applauded, del Potro wiped away tears.

    Earlier, Murray acknowledged a brief dip in play after the argument over the let but preferred to focus on other reasons for his exit.

    “I broke serve enough times,” Murray said. “I just didn’t hold serve enough. That was the difference.”

    But Murray complained about the ruling right away, gave away the next three points to lose the game, then brought it up again with Cicak at the ensuing changeover, saying something similar had happened earlier and play had continued.

    “Exactly the same thing,” Murray exclaimed. “And I told you.”

    He also spoke to a tournament supervisor about it, pleading his case and saying, “That’s not fair.”

    (SD-Agencies)