Published Sunday, 08 June 2014
O'Connell has said his side need to prepare for a big battle in the next Test. (© Getty)
Chris Henry also crossed in the opening period for Ireland, but a leg injury to Sexton 16 minutes from time will concern coach Joe Schmidt ahead of next weekend's second Test in northern Argentina.
It was a night to enjoy for the Irish side, but captain Paul O'Connell admitted the game had been tough due to basic errors made.
"It was very hard going, we knew it was going to be physical which it was. We didn't know we were going to be as inaccurate as we were. We put a lot of balls down and missed some tackles," he said.
"They had some very big men, some really good footwork and they put us under a lot of pressure and it kind of thrived off our mistakes, we were unlucky not to score a try early in the first-half. And 30 seconds later we were lucky not to concede a try.
"So that's kind of the way they play and we knew that but I suppose we were intent on trying to stop that and we didn't do that.
"They put us under a lot of pressure, I think the result is great but the performance is disappointing."
O'Connell admitted the key now is for Ireland to put in another good week's work and wrap up a highly satisfactory season with another win at the clash in Tucuman.
"I think it's important to be able to try and play well without having a reference point, our last reference point was the France, a lot of the boys wouldn't have played in that game," he added.
"You look at what England did going down to New Zealand putting in a big performance against them, that's what we needed to do and we didn't do that.
"This gives us something to work on now and something to review over the next few days and knowing Joe Schmidt it will be a very tough review and hopefully our performance will improve next week."
© UTV News