The Stormers claimed their fourth victory from five games in Super Rugby this season as they saw off the Jaguares 13-8 at Vélez Sarsfield.
Both sides scored a try apiece but it was ultimately the boot of Kurt Coleman that proved the difference on an off day for the Argentines.
It was a frustrating first-half for the hosts, who were 3-13 down until the closing stages before Jeronimo de la Fuente crossed the line.
Credit must go to the Stormers for the hosts' troubles though as the visitors enjoyed the majority of the territory in the opening stanza.
Coleman got them on the board early with a fourth minute penalty and then doubled the lead on 18 minutes after the Jaguares offended.
Fortunately for the hosts, Nicolás Sánchez halved the deficit soon after as the Stormers came offside in a rare period of defensive work.
They were back on the front foot soon though and with Sánchez in the sin-bin for slowing down the ball after Leolin Zas' break, the away team capitalised with Cheslin Kolbe stepping several before going over. Coleman's extras meant it was a welcome ten-point lead for them.
Sánchez was clearly determined to make amends for his offence and on his return a wonderful clearing kick from a penalty preceded him then slicing through the Stormers defence before setting up centre De la Fuente. He could not slot the conversion, however, so it was 10-13.
The Jaguares were the team in form after the break too and came agonisingly close to scoring early on when flanker Tomás Lezana lost the ball over the try-line after a powerful initial carry from Tomas Lavannini. They would hope that near miss wouldn't prove costly at full-time.
One player also hoping his mistakes wouldn't come back to haunt his team was Sánchez, who was wayward with a second attempt at goal on 62 minutes, this time after the Stormers were penalised at the scrum. Along with his earlier conversion, this was an uncharacteristic error from him.
It seemed to be the Stormers day and so it proved as they played a smart game in the closing stages, holding on for the four points, with the Jaguares missing another penalty, through Santiago González Iglesias, and having a five-metre attacking line-out pinched to cap a poor outing on home soil.
Try: De la Fuente
Yellow: Sánchez (slowing down ball - 23 mins)
Pen: Coleman 2
Jaguares: 15 Joaquín Tuculet, 14 Matías Orlando, 13 Matías Moroni, 12 Jeronimo de la Fuente, 11 Lucas González Amorosino, 10 Nicolás Sánchez, 9 Martín Landajo, 8 Leonardo Senatore, 7 Tomás Lezana, 6 Pablo Matera, 5 Tomas Lavannini, 4 Matías Alemanno, 3 Felipe Arregui, 2 Agustín Creevy (c), 1 Santiago García Botta
Replacements: 16 Julián Montoya, 17 Roberto Tejerizo, 18 Enrique Pieretto, 19 Guido Petti, 20 Facundo Isa, 21 Gonzalo Bertranou, 22 Santiago González Iglesias, 23 Santiago Cordero
Stormers: 15 Cheslin Kolbe, 14 Kobus van Wyk, 13 Johnny Kotze, 12 Juan de Jongh (cc), 11 Leolin Zas, 10 Kurt Coleman, 9 Nic Groom, 8 Nizaam Carr, 7 Siya Kolisi, 6 Sikhumbuzo Notshe, 5 JD Schickerling, 4 Eben Etzebeth, 3 Frans Malherbe (cc), 2 Scarra Ntubeni, 1 JC Janse van Rensburg
Replacements: 16 Bongi Mbonambi, 17 Oli Kebble, 18 Vincent Koch, 19 Jan de Klerk, 20 Schalk Burger, 21 Louis Schreuder, 22 Jean-Luc du Plessis, 23 Huw Jones
Referee: Chris Pollock
Assistant Referees: Jamie Nutbrown, Federico Anselmi
TMO: Santiago Borasni