VIRGINIA WATER, England (AP) — Rory McIlroy opened the defense of his BMW PGA Championship title on Thursday with a 1-under 71 that left him four strokes behind clubhouse leader Robert Karlsson. McIlroy says "I felt like I left a couple of shots out there" and that "I did not do anything that good and there is definitely room for improvement over the next few days.Read more on NewsOK.com