Rory McIlroy battled against fierce winds to remain in contention at the Irish Open on Thursday with a one under par opening round to sit four shots behind leader Joaquin Niemann.
US President Donald Trump is set to jet in to attend the event over the weekend, which is being held at his resort in the County Clare village of Doonbeg.
Northern Irishman McIlroy is defending his title and aiming to win for the first time since collecting a second green jacket at the Masters in April.
Defending Champion Rory McIlroy cards an opening round 69 (-1) 🤝#AmgenIrishOpen pic.twitter.com/4py4JCNtUZ
— DP World Tour (@DPWorldTour) September 10, 2026
A double bogey six at the 13th set the world No 2 back, but those were the only dropped shots of his round, which was disrupted by the blustery conditions leading to a glacial pace of play.
"I hung in there, shot under par, and at least don't feel like I'm out of the tournament. A good day tomorrow gets me right back in it," said the six-time major champion.
"There were a couple of things that were tough today. Obviously the wind and the strength of the wind was one thing, and then the pace of play."
"This course isn't conducive to sort of letting you get in a flow. Especially the first two days with so many people in the field, there is a lot of stopping and starting."
Niemann made four birdies in a row from the 14th to forge ahead.
Niemann cards an opening round 65 and sets a new course record! 🇨🇱
— DP World Tour (@DPWorldTour) September 10, 2026
If no one cards a lower round for the rest of the week, Joaquin Niemann will win $30,000 courtesy of @Nexo 💰#AmgenIrishOpen pic.twitter.com/8NHS1b5sTV
"It's a really tricky course and a really fun golf course to play with, especially with the Irish weather," said the Chilean. "(I'm) getting used to this weather and the rain, so it was fun."
Delays caused by the conditions meant that some players will have to return early on day two to complete their opening rounds.
Home favourite Shane Lowry is among a five-strong group, two shots behind Niemann after a 67.
SHANE LOWRY DRIVES THE GREEN TO 15FT ☘️#AmgenIrishOpen pic.twitter.com/Un8sh12B9R
— DP World Tour (@DPWorldTour) September 10, 2026
Adrian Meronk, Maximilian Steinlechner and Renato Paratore were also at three under when bad light brought their opening day to an end without completing their rounds.
Jon Rahm was level par on a rare appearance back on the DP World Tour as speculation surrounds his future after LIV Golf filed for bankruptcy in the USA.