Telfer was head coach of Scotland from 1980-1999
Jim Telfer says Scotland's lack of tries remains a concern, despite tipping them to win the series when they face Argentina again on Saturday.
Stand-off Dan Parks kicked all of the points in the 24-16 tour-opening win against the Pumas in Tucuman.
"It's worrying, because they had plenty of the ball, they tried to move it wide - sometimes that's fairly predictable," said the former Scotland coach.
"But Argentina an ageing team, going backwards, Scotland are going forward."
The Scots came from 13-6 down on Saturday to become the first international side to beat the Pumas in Tucuman, with Parks landing six penalties and two drop goals.
Despite the result, Telfer felt Scotland struggled to get forward and cross the line, which could prove problematic against stronger sides.
"What happens is, there's a lack of control at the breakdown far out and there's decisions being made that are just not on," said Telfer.
"That's what happened when Argentina scored their first try.
"They can counter-attack and they have good rugby players, but Scotland has a problem in trying to cross the line - especially through the back.
"I think we will score tries through the forwards, because we have a good offloading back row and the rest of the forwards can do that as well.
"But the backs run across the field too much and there's a lack of accuracy in passing, which comes from playing.
"Glasgow and Edinburgh are similar. They're often on top of the opposition, but they don't score many tries."
Scotland next face Argentina on Saturday in Mar Del Plata and Telfer believes the visitors can win the series as head coach Andy Robinson continues to develop a side for the future.
The atmosphere won't affect Scotland at all, they'll relish it, and they have this great confidence in having beaten them in their own back yard, so I think they can do it on Saturday
Former Scotland coach Jim Telfer
"I think he knows the game very well," said Telfer. "He knows how to win and he knows how to build a team up and that are difficult to beat.
"Scotland are very difficult to beat - they have a very good defence.
"Andy played at the highest level and coached at the highest level and he believes in what he's doing. I think the players believe in him, probably more than they've done for a little while.
"They've put themselves in a good position to win the second Test.
"People say the Argentineans will be fired up - but so will Scotland.
"As Andy said before the match on Saturday, Scotland like playing in bear pits.
"The atmosphere won't affect Scotland at all, they'll relish it and they have this great confidence in having beaten them in their own back yard, so I think they can do it on Saturday."