Chelsea's Andriy Shevchenko and Liverpool frontman Andriy Voronin will pose the main threat to Scotland at Hampden in Saturday's Euro 2008 qualifier.

Scotland are desperate to take three points to stay at the top of Group B, and give themselves every chance of going through to the finals.

But Weir is not taking Ukraine lightly, even if this weekend's visitors have taken just one point from their last available nine.

He remembers all too well the 2-0 defeat Scotland suffered in Kiev last October.

"Ukraine are a top side, there is no doubt about that," Weir told Rangers News.

"But we played them away from home last time around so things will be slightly different when we play them at Hampden as I am sure the atmosphere will be unbelievable.

"In players such as Shevchenko and Andriy Voronin they have two world-class stars and they have so much quality throughout their team. We know it will be a tough game and we will have to be at our best if we are to get a win."

Weir, 37, will win his 59th cap and admits the game is a high-stakes fixture, just like next week's match in Georgia and the November 17 clash with Italy at Hampden.

"Every international you are involved in is crucial," he said, "but the significance of the ones coming up can't be underestimated because of our position in the group."

Scotland and Rangers colleague Kris Boyd agrees with Weir that Shevchenko is a player to be feared, even if his Chelsea form has been disappointing since moving from AC Milan to Stamford Bridge.

Boyd told The Sun: "It's not been happening for him since he's gone to England but don't tell me that he's lost it. I don't believe that for a minute."