Oliver Fisher was thrilled to shoot the first 59 in European Tour history, two years on from saving his card at the same venue.
At the 2016 Portugal Masters, Fisher managed to finish in a tie for 10th to secure his future on the Tour, but Friday's achievement was all the more spectacular.
The Englishman, ranked 287th in the world, carded 10 birdies and an eagle to finish 12 under for his second round and propel himself into the clubhouse lead at Vilamoura.
Having signed for an even-par 71 on day one, Fisher was ecstatic to be able to share his record-breaking moment with those close to him.
That scorecard... pic.twitter.com/WhTiXd65Va— 59 on the European Tour (@EuropeanTour) September 21, 2018
"I'm lucky, really lucky that my fiancee is here and there's so many friends around," he told Sky Sports.
"You don't really realise it when you're out there, but coming off there, seeing everyone is an amazing feeling.
"That day [in 2016] was a really tough day in the circumstances. Coming to the end of the round there's a lot of water, it's make or break, that day I birdied 17 and 18 and was elated.
"I've done it before under different circumstances, today the weather's lovely and really nice, it's a special moment.
"It's very different [chasing 59 instead of a win]. It's not that often you get to shoot a really low one. I was just grateful I hit two good drives on those two holes, 17 and 18 are all about tee shots on this course, thankfully I hit the fairways and gave myself a chance."
Fisher last and only European Tour win came back in 2011, but the 30-year-old will not be concerning himself with thoughts of victory with two rounds still to come.
"I've not really looked at the leaderboard all day, which I think is a good thing," he said.
"I just tried to stay in the moment, keep thinking about the shot that's happening right now. Over the weekend it'll be much of that again."
|Curry, Durant lead Warriors past Thunder|
|Kjaer surprised by LaLiga-leading Sevilla as Machin´s men remain grounded|
|A-League preview: Honda the big arrival as fascinating season awaits|
|Mexico 0 Chile 1: Sanchez helps La Roja to late win|
|Celtics too good for 76ers in NBA opener|
|United States 1 Peru 1: Flores salvages late draw for visitors|
|Martinez not worried about Belgium depth|
|Red Sox move ahead of Astros in ALCS|
|Depay ´a joy to watch´, says Koeman|
|Timberwolves owner looking to trade Butler, backs Thibodeau|
|Shepard says Giants have ´total faith´ in Manning|
|Hazard is out of this world – De Ligt enjoys Belgium test|
|Tite: Brazil were better than Argentina|
|Foley eyes World Cup after re-signing with Wallabies, Waratahs|
|Low slams decisive France penalty call|
|I fined him for his goal at Old Trafford! Giggs delighted for Wales hero Wilson|
|Matuidi lauds Deschamps´ tactical nous after Germany win|
|Scaloni excited by Argentina despite Brazil loss|
|Tsonga back in business, Dzumhur dumped out in Moscow|
|Germany suffer six defeats in a year for first time|
|Many clubs have asked about Piatek - agent|
|Bartomeu: Barca open to defensive reinforcements after Vermaelen injury|
|Bonn spoil PAOK´s landmark European game|
|Konta conquers Mertens in Moscow|
|Republic of Ireland 0 Wales 1: Wilson stunner moves Giggs´ side top|
|France 2 Germany 1: Griezmann delivers Low blow as Les Bleus reign in Paris|
|Belgium 1 Netherlands 1: Groeneveld cancels out Mertens strike|
|Argentina 0 Brazil 1: Miranda heads late winner after rivalry fails to ignite|
|Messi would struggle in this Manchester United team – Scholes|
|Falcons place Devonta Freeman on injured reserve|
|Westbrook ruled out of Thunder opener|
|Wilder´s team open to Joshua talks|
|Brentford appoint Thomas Frank as new head coach|
|England´s perfect performance sets the standard - Trippier|
|Odell Beckham Jr. needs to create headlines on the field, says Giants owner|
|Robshaw joins list of England absentees|
|Chile need goals from Sanchez despite United form - Rueda|
|Modric reveals Ronaldo respect, ´will never play with´ Messi|
|Osaka can be one of the greats, says coach Sascha Bajin|
|Liverpool´s Naby Keita carried off injured in Guinea match|
|Duminy to miss Australia tour for shoulder surgery|
|F1 Raceweek: Ferrari ready to ´challenge the impossible´ as Hamilton nears title|
|Umesh replaces injured Thakur in ODI squad|
|IAAF delay implementation of testosterone ruling amid Semenya challenge|
|Fakhar and Sarfraz lead Pakistan recovery after Lyon blitz|
|Japan see off Uruguay in seven-goal thriller|
|Arda Turan given huge fine by Istanbul Basaksehir after alleged brawl with singer|
|Busquets no better or worse than Dier – does Opta data back up Allardyce claim?|
|United boss Mourinho charged for alleged post-match comments by FA|
|Halep withdraws from Kremlin Cup ahead of WTA Finals|
|Renato Sanches eager for further Bayern Munich minutes|
|Nations League standings: Promotion, relegation and race for finals|
|Windies coach Law banned for ´inappropriate comments´ in India Test|
|Carrick denies Manchester United stars are ´not trying´|
|Ferrari struggling under pressure of chasing Mercedes, says Massa|
|Australia desperately need Smith and Warner back - Warne|
|Draxler warns Germany: Mbappe has 300 hp!|
|Draymond Green says Warriors will have to ´bring it´ every night in the West|
|England´s ´wonderful bravery´ leaves Southgate excited for the future|
|Jayasuriya: I always conduct myself with integrity and transparency|
|Northern Ireland stars hurt by lack of club football, says O´Neill|
|Rodgers inspires late Packers comeback|
|Brewers blank Dodgers to take 2-1 NLCS lead|
|Cavaliers, Nance agree to four-year extension|
|Ramos wants Spain to believe in Luis Enrique´s team|
|De Laurentiis: I´ve spoken to Genoa and agent about Piatek|
|Kaka tips bright future for Paqueta after Milan agreement|
|Suns star Booker set to return for season opener|
|Warriors coach Kerr not expecting fast start from NBA champs|
|Fultz to start for 76ers as Brown eyes NBA Finals|