Rory McIlroy's long wait for a fifth Major continues as Wyndham Clark delivered a mostly composed performance to claim the 123rd US Open at Los Angeles Country Club by a single shot.A first-time winner on the PGA Tour in May when he claimed the Wells Fargo Championship, Clark scrambled tremendously throughout two thirds of his round before cracks started to appear on the final difficult stretch.Fortunately for Clark, McIlroy couldn’t apply any pressure - despite a fantastic recovery on the 17th for par – with his nine under total coming up a shot shy of forcing a play-off.Scottie Scheffler made a late charge but his final round 70 saw him finish on seven under.For McIlroy, this near miss may hurt more than any of the others as his wait for a first Major since the 2014 PGA Championship continues.Sensational from tee to green until those final holes, his putter again deserted him when he needed it most, a series of birdie chances just slipping by the hole.Superb par saves on the ninth and 11th kept Clark in the lead and his advantage was doubled when McIlroy’s run of 12 pars ended with a bogey on the 14th.The moment @Wyndham_Clark became a major champion. #USOpen pic.twitter.com/TIlB87G3o3McIlroy was perhaps fortunate to get a free drop when his approach became embedded in the face of a greenside bunker, but he was unable to get up and down for par.Clark then struck a brilliant approach on to the green from 282 yards and two-putted for birdie from 20 feet to extend his lead to three.Bogeys at 15 and 16 did ensure a shaky finish, but a par at the 17th left him with two putts to win at 18, and he cosied the first down to ensure the easiest of second putts to write his name on the trophy.Third-round joint-leader Rickie Fowler