Argentina's Ricardo Rubinat, Jorge Barreto and Raul Pollet inflicted a shock defeat on the English trio of Ian Lesley, David Bolt and Sam Tolchard in the men's triples event at the World Bowls Atlantic Championships in Wales.
The Argentinian team recorded an 18-11 win over their English opponents.
Both sides, along with Wales, are on six points in section two.
They trail leaders Greg Davis, Scott Ruderham, Malcolm De Sousa of Jersey, who have 10 points, while South Africa's Prince Neluonde, Jason Evans, Billy Radloff occupy second place with seven.
Commonwealth Games gold medalists Ronnie Duncan, Derek Oliver and Darren Burnett of Scotland are the only unbeaten team in section one of the men's triples.
The Scottish team beat Namibia 20-12 and Brazil's 24-7 to improve their record to four wins from their opening four matches.
Ireland's Adam McKeown, Neil Mulholland, Andrew Kyle are their closest challengers on nine points following their 19-12 win over Spain.
In the women's singles competition, former world indoor champion Caroline Brown of Scotland and England's Commonwealth Games gold medallist Natalie Chestney maintained their 100 per cent record.
Brown defeated the Isle of Man's Pam Makin 21-6, while Chestney overcame Cindy Royet of France 21-19.
The tournament, being played at four venues across Wales, continues tomorrow.