Apart from his hat-trick of tries, Feinberg-Mngomezulu also kicked eight conversions and two penalty goals, pushing his individual points' tally past the previous record of 35, that was set by Percy Montgomery against Namibia in Cape Town in 2007.
The Bok flyhalf bettered the previous best mark with the last play of the match, converting a second try by Pieter-Steph du Toit, much to the delight of the 45,158 people who attended a thrilling Test that will be remembered for a long time.
It was a match of two halves no doubt, but as Argentina realised to their peril, you need to play well in both when you face South Africa.
They had some say in the opening 40 minutes, but the quality of tries from the South Africans in the second half was too much to handle for Argentina, who will host the Springboks next weekend at Allianz Stadium, Twickenham in London in the last match of the Championship.
The Boks started well, but had an up and down first half. Early scrum dominance resulted in a penalty and Feinberg-Mngomezulu kicked the points from close to 50m to hand the hosts a 3-0 lead.
Four minutes later, Santiago Carreras replied to level scores. His penalty attempt came from offside play by the home side at a ruck. Argentina had good possession in the Boks’ half and the over-eager efforts from the home side to get off the line cost them three points.
That soon became six as the Boks were again too quick off the line from open play and Carreras kicked another penalty goak, this time from close to 50m out, to give his side the lead.
Two minutes later, scores were even courtesy of another Feinberg-Mngomezulu penalty goal from a high tackle by Pablo Matera on Jasper Wiese.
Pieter-Steph du Toit goes over for his first try of the match.
The Springboks were quick off the line still but were not making dominant hits on defence and that gave the visitors early territorial dominance. The Pumas were their worst enemy though as their line-out malfunctioned early on, allowing the Boks to get away from their red zone on two occasions.
Carreras added a third penalty goal 25 minutes in after the Boks were ruled offside from a lineout.
The Boks thought they scored via an elaborate sequence of plays which resulted in Eben Etzebeth crashing over, but the TMO spotted a knock-on from Cobus Reinach in the lead-up and the try was disallowed.
The hosts still had some advantage though and from a resulting lineout, Malcolm Marx scored the first try of the match 31 minutes in. The Bok hooker did the basics right by finding his jumper, then joined the maul to score his 25th Test try. The conversion went wide, but the Boks were starting to flex their muscles, much to the approval of the crowd.
The 11-9 lead was threatened by a long-range penalty attempt by Carreras, but it sailed wide and 35 minutes in, the edge by the home side seemed justified.
A rare mistake by Cheslin Kolbe handed the Pumas the lead five minutes before the break. The winger took a quick goal-line drop-out, but botched his kick and Santiago Chocobares jumped on the ball to score.
However, from the restart, Feinberg-Mngomezulu scored his first try of the match and his conversion from the touch line handed the lead back to the Boks.
Argentina had one more charge and they made it count. A lineout close to the SA try line resulted in a penalty try to the visitors as Marx was ruled being offside and collapsing the maul. He was yellow carded, but that did not stop the Boks, who score the next two tries while he was off the field, each both sides of the halftime whistle.
Siya Kolisi on the attack.
First, straight from the restart, the Boks attacked and Feinberg-Mngomezulu scored after several charges at the Pumas line. He added the conversion and the Boks took a 25-23 lead at the break.
The second half started in the best way possible for Kolbe. Damian Willemse won a high kick contest, the ball was recycled, Feinberg-Mngomezulu kicked a foot pass to the Bok speedster who scored and suddenly the hosts opened a gap on the score-board.
Feinberg-Mngomezulu scored his third after selling the Pumas pack a delightful dummy near their own line. He converted for a 39-23 lead.
Tomas Albornoz then added his name to the score sheet with a delightful solo try after stepping past a couple of heavies in the Bok pack, with the replacement back grabbing his third Test try against the Springboks, which cut the lead to nine points (39-30) with 24 minutes to play.
But that was the last time the visitors would bother the scorers.
Morné van der Berg, who replaced Reinach, scored after a couple of delightful offloads and Feinberg-Mngomezulu converted for a 46-30 lead with just under 20 minutes to go.
Du Toit scored his 13th Test try 66 minutes in, with Feinberg-Mngomezulu’s conversion taking him past Handré Pollard’s 31 points in Salta in 2019 for points scored in a Test match against Argentina. Montgomery’s milestone was under threat as well.
That came soon after, courtesy of Manie Libbok who chipped and chased for his second Test try and the conversion saw the Bok flyhalf pull level with Montgomery.
The night was complete when Du Toit scored again and Feinberg-Mngomezulu’s conversion took him to 37 test points.
The bonus-point win also moved the Boks to 15 points on the Rugby Championship log, one more than the All Blacks, with one round of matches to go. The Wallabies host New Zealand in Perth next Saturday, and South Africa take on Argentina in London.
Scorers:
Springboks 67 (25) – Tries: Malcolm Marx, Sacha Feinberg-Mngomezulu (3), Cheslin Kolbe, Morne van den Berg, Pieter-Steph du Toit (2), Manie Libbok. Conversions: Feinberg-Mngomezulu (8). Penalty goals: Feinberg-Mngomezulu (2).
Argentina 30 (23) – Tries: Santiago Chocobares, Penalty Try, Tomás Albornoz. Conversions: Santiago Carreras (2). Penalty goals: Carreras (3).
