Jordan Spieth rued a "brain fart" at the 15th hole that halted the momentum he had garnered during round one of his Open Championship defence.
The three-time major winner was going nicely at three under through 14 holes, but a six iron into a fairway bunker meant his third shot had to be played out to the left and eventually cost him a double bogey.
Further wayward striking led to dropped shots at the 16th and 18th holes as Spieth signed for a one-over-par 72, which was six shots back of clubhouse leader Kevin Kisner.
And the American acknowledged his opening round was a missed opportunity to be further up the leaderboard.
"It was an easy decision. I just hit the wrong club [at 15]," he said.
"I hit a four iron off the tee. I thought it was locked up and it ended up in the fescue.
"I hit a lot of shots I didn't think were as good and I walked up and kind of got good breaks, especially starting the round.
"But the problem was on the second shot I should have hit enough club to reach the front of the green and even if it goes 20 yards over the green, it's an easy up-and-down.
"And that's what I would consider as significant advantage for me is recognising where the misses are, and I just had a brain fart, and I missed it into the location where the only pot bunker where I could actually get in trouble, and it plugged deep into it.
"It was a really, really poor decision on the second shot and that cost me.
"It felt like a missed opportunity. I felt like I was really going well. I had a nice par save after driving it in the bunker at six.
"Other than that, it was very stress-free. I was putting the ball where I needed to, having maybe no more than fewer feet for par on every hole. It was just a clean round of golf."
Despite his disappointing finish, Spieth is confident he can claw his way back into contention for the Claret Jug.
"I think I'm certainly in a recoverable situation. I mean, I imagine this is as easy as the course could play," he added.
"I don't see the winning score being any better than it was in 2007 with [Friday's] forecasted tough conditions and Sunday's forecasted heavy winds.
"It's not a bad place to be. You know, a solid round to stay in the top 25, top 20 will be kind of the goal to feel like I can do something on the weekend."
22. Oktober 2018
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|Bolt must accept ´much less´ to join Mariners, says A-League chief|
|Klopp compares Liverpool to dog without favourite toy|
|Young leads Hawks to first win, Thunder fall in Westbrook´s return|
|Spalletti hits out at physical Milan – I had three players asking to be replaced|
|Cowboys, Ravens lose after missed kicks in final seconds|
|Hernangomez secures Nuggets´ win over Warriors with last-second block|
|Hasler returns to Manly on three-year deal|
|Sarri: Chelsea fans must respect Mourinho|
|Ronaldo learnt from Scholes – Pjanic praises Juventus star|
|CA dismisses spot-fixing claims|
|WATCH: Will Ferrell leads chants with LAFC fans|
|MLS Review: Galaxy on track for play-offs as Timbers, DC clinch spots|
|Elliott secures win at Hollywood Casino 400|
|Thunder´s Westbrook makes season debut against Kings|
|Saints beat Ravens after Tucker misses extra point|
|Rondo, Paul and Ingram banned after Lakers-Rockets fight|
|Saints QB Brees reaches another historic milestone|
|Biglia: VAR should have checked Nainggolan tackle|
|Gattuso not blaming Donnarumma for derby defeat|
|Seventh in Mexico will secure Hamilton´s fifth world title|
|Rooney fires DC United into MLS play-offs|
21. Oktober 2018
|Alonso slams ´amateur´ F1 rivals after latest crash|
|Spalletti fears lengthy Nainggolan absence|
|To the Max! Verstappen destroyed shoe fending off Hamilton|
|Icardi delight after Donnarumma error gives him another derby winner for Inter|
|Guardiola: Versatility the key for Stones|
|Vettel frustrated as mistakes continue to hamper title challenge|
|ECB refutes spot-fixing claims against England players|
|I thought we would do better - Hamilton queries Mercedes strategy|
|Inter 1 AC Milan 0: Icardi settles derby with dramatic late winner|
|Hamilton denied title party as Raikkonen wins in Austin|
|Patriots RB Michel out against Bears with gruesome knee injury|
|Kohli hails Rohit partnership after comprehensive India victory|
|Silva downplays his role after Everton super subs seal victory|
|Injured Bairstow out of final white-ball matches in Sri Lanka|
|Pliskova feeling confident after impressive start in Singapore|
|Big-hitting Imrul rescues Bangladesh in opening ODI|
|Leinster suffer late defeat at Toulouse, Newcastle snatch dramatic victory|
|Chargers pip Titans to dramatic London win|
|Everton 2 Crystal Palace 0: Substitutes Calvert-Lewin and Tosun clip Eagles´ wings|
|Thunderstorms push Andalucia Valderrama Masters into reserve day|
|Edmund masters Monfils to claim maiden singles title|
|Kohli and Rohit fire India to comprehensive ODI win|
|Manchester United didn´t play - David Luiz blasts Mourinho tactics|
|Svitolina out to silence ´haters´ in Singapore|
|Emre Can facing surgery on thyroid problem|
|Tsitsipas claims maiden ATP crown in Stockholm|
|Mariners boss Mulvey knows nothing of Bolt contract offer|
|WATCH: Vinicius Junior scores free-kick - then sees red!|
|Gronkowski ruled out of Bears clash|
|Khachanov enjoys home comforts with comprehensive Kremlin Cup win|
|Isner wants Wimbledon tie-break rule named after him|
|Hummels lauds ´outstanding´ Lewandowski|
|Liverpool´s defensive improvement no accident – Gomez|
|Pliskova overpowers defending champion Wozniacki in Singapore|
|Marquez dislocates shoulder celebrating MotoGP title|
|Henry taking positives from opening Monaco defeat|
|A-League Review: Mariners held as Bolt considers move|
|Dominant Svitolina ends Kvitova hoodoo in Singapore|
|Pereira warns Juventus to expect ´pumped up´ Manchester United|
|D´Antoni backs NBA to ´sort out´ Lakers-Rockets brawl|
|Mixed feelings for champion Marquez after Dovizioso crash|
|Bolt offered contract by Central Coast Mariners|
|Anthony accuses Rondo of spitting after Lakers-Rockets brawl|
|Martial insists he has good relationship with Mourinho|
|Bautista to replace Lorenzo at Phillip Island|
|Emery wanted Lacazette at Paris Saint-Germain|
|Wallabies centre Hodge suffers fractured ankle|
|Koepka claims top ranking with CJ Cup win|