Rory McIlroy was audibly frustrated by a wayward effort that all-but ended his hopes of winning The Open.McIlroy returned to the Royal Portrush Golf Club for Sunday’s final round eight under and six behind the leading Scottie Scheffler.McIlroy got off to a strong start in the fourth and final roundGettyIn front of his home crowd in Northern Ireland, the 2025 Masters champion managed to hit three birdies on the front nine.But his efforts were undone with a disastrous outing on the tenth hole to leave a second major win of the year almost impossible.McIlroy just landed on the rough with a 279-yard strike before sending his second shot way over the green and behind the hole.“Oh my God, s***,” he said after his effort, which was certainly far from ideal for the five-time major champion.Sky Sports Golf commentator Ewen Murray said: “Apologies if you picked up anything on the microphone.”McIlroy’s struggles continued as he finally putted with his sixth shot to double bogey the par four hole.His slip of the tongue wasn’t his first at this championship as a similar occurrence came on day three.Another wayward shot, this time on the 15th hole, was met by an angered response of: “Ahh, I [inaudible] the f*** out of it.”“An apology for the language from Rory earlier on,” said one of the commentators amid the frustration on display.McIlroy also experienced a bizarre shot on Saturday on the 11th hole to leave him and fans baffled.A mishit shot at the start of the back nine left him with work to doGettyIt seemingly dashed any chances of a comeback and second Open title winGettyOnce he hit his ball, a second one that was seemingly buried under the playing surface flew out and caught him off guard.With the newly-discovered ball in his hand, McIlroy presented it to the crowd and later explained his confusion with what happened.“The most weird, ridiculous thing I’ve ever seen,” he said. “It’s never happened to me before.“It could never happen on any other course but a links course as well. When the rough is all matted down and the balls get… It was very strange.”After his double bogey on Sunday, McIlroy hit par on holes 11, 13 and 14, with a birdie on the 12th offering some encouragement.