SHELLEY Kerr believes her side will beat Argentina tonight if the players find their A game after a stirring message of support from Sir Alex Ferguson.

A World Cup win against Argentina at the Parc des Princes will not necessarily guarantee them becoming the first side from this country to qualify for the knock-out stages of a major championship, but it looks very likely – and the head coach and her players have been boosted by words from the former Manchester United and Scotland manager.

"He sent us a video message before we came here and that meant the world, it was just brilliant,” Kerr said. “The players and myself all hang onto every word he says because it's all so meaningful.

"Today, a text comes in from an unknown number. It's Sir Alex, giving me his chat about the games and what he thinks about the one to come. He said we've had some decisions go against us. He's watched the games, he's thought we've given our utmost, shown great determination and that it's about being winners.

"Obviously it's a private message, but that's the crux of it. He's been impressed by the way we've handled the games so far, especially in the second half. The very fact that he's tuning in and offering his opinions on our performances is just brilliant.”

Tonight's stadium provided two of the great Scotland men's sporting successes. In 1995 Gregor Townsend's Toonie Flip and Gavin Hastings' try brought a rare win in Paris, and twelve years later James McFadden produced his own moment of inspiration to beat the hosts in Euro 2008 qualifying.

Argentina don't lack motivation themselves tonight. They already have a point from a draw against Japan and a win would give them four and a guaranteed last 16 place.

Their performances in France have impressed Kerr, but she is adamant that her players should win if they play to their potential.

“If they bring their A game I'm sure it will be a positive result for us,” the Scotland head coach promised. “We have to be more attacking in this game – and I think Argentina will have to at some stage as well.

“It has been brilliant we've scored two goals, because obviously goal difference is a big thing for us when you look at the other groups.

“We've put ourselves in a fantastic position – although granted, and myself and the players have said it, we've maybe not performed to our optimal best.”

Kerr has no injury worries apart from midfielder Christie Murray, who hurt her knee in the opening game. Fifa are anticipating a crowd of 25-30,000 for the biggest game in the team's history.