FILE - In this Aug. 12, 2017, file photo, Rory McIlroy watches his tee shot on the third hole during the third round of the PGA Championship golf tournament at the Quail Hollow Club in Charlotte, N.C. McIlroy says he has a heart ailment that will have to be monitored regularly but is not expected to affect his play. McIlroy said that he has a thickening of the left ventricle. He says doctors told him it was caused by a viral infection he suffered in China 18 months ago. He says he’ll get an electrocardiogram every six months and an MRI once per year. (AP Photo/Chuck Burton, File)
Rory McIlroy missed large parts of the 2017 season due to a rib injury but insists there are no fitness issues ahead of the 2018 season. Chuck Burton / AP Photo

Rory McIlroy plays down heart health fears and insists he 'can't wait' to start season at Abu Dhabi HSBC Championship