Shane Lowry made the ideal start to his bid for a second Open title, carding a flawless 66 to hold a two-shot lead over former world number one Justin Thomas after Rory McIlroy struggled to an opening 78.
It was a contrast which immediately brought to mind the 2019 Open at Royal Portrush, when Lowry started with a 67 on his way to the Claret Jug and McIlroy’s chances were blown away with a 79.
“It was enjoyable,” Lowry, who made birdies on the fourth, seventh, eighth, 11th and 18th, told Sky Sports.
“I got off to a bit of an iffy start and holed a couple of nice par putts early on and then I was off and running.
“I try not to think about it [2019] too much now. I holed a putt to go into the lead and I thought ‘It’s the first time I’ve led The Open in five years’.
“No matter what I do that week in Portrush will always have a special place in my heart. I love that place and I love this tournament.”
A downbeat Rory McIlroy had earlier dismissed his chances of mounting a challenge for a fifth major title after a costly run of holes around the turn.
According to statistician Justin Ray, lead data analyst at KPMG Performance Insights, 87 per cent of Open winners since 1960 have been within four shots of the lead after the first round.
Asked if he could make up the ground he had conceded, there was a lengthy pause before McIlroy said: “I mean, all I need to focus on is tomorrow and try to make the cut. That’s all I can focus on.
Bryson DeChambeau, who edged out McIlroy at Pinehurst to win his second US Open, also found himself well down the field following a 76, although the American did at least hole from 55 feet for an eagle on the 16th.
Thomas had set the clubhouse target on three under par thanks to birdies on the 17th and 18th, the two-time major winner’s 68 representing a 14-shot improvement on his opening round at Hoylake last year.
“I couldn’t even tell you what I was thinking or how it was then,” Thomas said when asked to compare the two rounds.
“I’m just worried about how I am now, and I’m very pleased with my game and know things are continuing to work in the right direction. I’ve just got to keep trying to play well.”
Sweden’s Alex Noren, who only secured his place in the field via a tie for 10th in the Scottish Open on Sunday, was a shot off the pace alongside American Russell Henley and Ryder Cup team-mates Justin Rose and Nicolai Hojgaard.
Rose, who had to come through a 36-hole qualifier to make it to Troon, carded two birdies and 16 pars in his bogey-free 69.
Related: McIlroy’s misfire
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