Iain Carter
BBC golf correspondent on BBC Radio 5 Live at Royal Portrush

An Ulster roar for an Ulsterman.

"Rory! Rory! Rory!" are the chants from the crowd as Rory McIlroy is given a huge ovation after making his way to the green at the par-four 18th.

The Northern Irishman has a smile on his face. He's soon down to business, though, weighing up a putt to finish with a birdie.

It's pretty bare down the 17th as co-leader Harris English approaches the end of his round.

He's clipped onto the green with his approach and will have an outside chance of a birdie.

We ended up keeping very quiet on this marquee trio of Ludvig Aberg, Viktor Hovland and Jordan Spieth - none of whom have particularly relished their opening round at Royal Portrush today.

A birdie from 18 feet at the last for Spieth at least draws him level with his playing partners at two over par - and that's only the fourth birdie we've seen at this hole today.

Go home, get some sleep, and come back (relatively) early tomorrow to do it all over again.

Oliver Wilson
Former Ryder Cup player on BBC Radio 5 Live at Portrush

Just coming into this final stretch he’ll be very happy with that.

Rory took full advantage of that lucky second shot – I don’t think he thought he’d be making three from that lie off the tee. Really nice little boost for him.

One little birdie makes the day feel better.

Tommy Fleetwood has not had much to smile about today, and he can barely bring himself to after a birdie on the penultimate hole.

Can Rory McIlroy follow suit? You bet he can. The Masters champion eases home from about five feet.

Jonathan Bradley
BBC Sport NI senior journalist

Image source, Getty Images

Quite the contrast from Wednesday to Thursday for Bryson DeChambeau on the 18th green.

The American, who was the last player we saw on the practice green just after 19:00 BST yesterday, was the darling of the crowd here a little over 24 hours ago as he entertained fans with trick putts before signing everything in sight.

Understandably he does not look as carefree today as another bogey sees him finish seven over.

Justin Rose is 45 feet away for birdie on the last and he sends his effort about six feet by. The par putt? Of course it drops. It always drops. This is Justin Rose we're talking about.

Rose ends two under and without a bogey on the card. He's one of just two players not to drop a shot in round one.

A nice way for Bob MacIntyre to finish as well. The US Open runner-up makes an excellent two-putt from long distance for a par that means he'll sign for a level-par 71.

Bryson DeChambeau has had a day to forget, though. A par putt from the fringe slips by the left edge and he'll be seven over par overnight. He hasn't made a single birdie all day and that's his worst-ever opening round at an Open Championship.

Justin Rose is currently bogey-free through 17 holes.

The only other player who hasn't made a bogey is Li Haotong, who shot four under par earlier today.

At the moment, Rose is two back off Li and the other four who share the lead.

Peter Scrivener
BBC Sport at Royal Portrush

Image source, Getty Images

R&A officials have met US President Donald Trump's son Eric to discuss The Open returning to Turnberry - but say logistical challenges remain.

The Ayrshire venue's iconic Ailsa Course, which is regarded as one of the best in the world, last hosted the championship in 2009 - five years before Trump bought the resort.

A total of 120,000 people attended that championship. This week's Open at Royal Portrush in Northern Ireland will have around 280,000 spectators, while 250,000 were at Royal Troon in 2024.

"We love the golf course - we've not taken it out of our pool of venues - but we have some big logistical issues there," said R&A chief executive Mark Darbon.

"You've seen the scale of the set-up here [Royal Portrush] and there's some work to do on the road, rail and accommodation infrastructure around Turnberry."

More here

A birdie chance for Rory McIlroy on the 17th? He takes a thick wedge of earth out to get out of the rough and on to the green.

To finish the day under par would be a boost after an up-and-down round.

Richard Winton
BBC Sport Scotland at Royal Portrush

Justin Rose has put together a beautifully serene round here. While Bob MacIntyre and Bryson DeChambeau have had their dramas, the Englishman has just gone hole to hole without any real mishaps. He’s right in this.

Harris English's ball comes to rest on the fringe of the 16th green, but he's safely in for a par three to stay in a share of the lead.

Oliver Wilson
Former Ryder Cup player on BBC Radio 5 Live at Portrush

Considering where he’s at on the leader-board it’s been a good round, McIlroy has hung in there because he’s been out of position many a time.

Not like him, normally a great driver of the golf ball and in the wind because he shapes it, he knows what it’s going to do but he’s been missing it left most of the day and really only hit a couple of good tee shots with that driver in right to left winds.

Purgatory by name, purgatory by nature for Rory McIlroy who must feel like he is constantly in limbo off the tee.

For reference, his ball is somewhere out left in the grisly rough after another wayward drive.

Rory McIlroy clinically putts for a par three on the 16th. Ditto Justin Thomas and Tommy Fleetwood.

Two holes to go for this grouping who went out at 15:10 this afternoon.

Image source, Getty Images

And a fine round comes to an end for Tyrrell Hatton and he is warmly applauded by the hardy punters who have continued to cram into the galleries surrounding the 18th green.

He's finished with six straight pars and will almost certainly go into round two just one shot off the lead.

Harris English leaves his approach on the front of the 15th green and his birdie putt rattles by a little further than he would like, leaving a seven-footer for par on the way back. He gets it though.

The tricky par-three 16th next for English.

Image source, Getty Images

Justin Rose has a big swinging putt for birdie on 17 and he leaves it absolutely stone dead for par. He's been rock solid today. You'd expect nothing less from Rose! What a competitor.

Robert MacIntyre has a 20-footer for birdie but that drifts wide and he has to settle for another par.

Bryson DeChambeau drops a further shot back.

Max: If Rory could drive straight he’d be on seven or eight under. In these conditions he’ll be upset if he’s not five under by the time he’s finished today.

Fi: McIlroy’s round is unravelling badly!