Scotland suffered a comprehensive 3-0 defeat against Holland in World Cup qualifying Group 9.
Woeful defending did the Scots no favours against a side ranked third best in the World although they did have a Gary Caldwell header harshly disallowed.
Scotland now trail the Dutch by eight points after four games as the home side eased to victory.
Coach George Burley said: "Goals change games. They got the first goal.
He added: "It was always going to be a difficult game. We gave it everything we've got.
"Holland are a tremendous team; they're one of the top six in the world."
Burley was mystified as to why Gary Caldwell saw a headed goal chalked off while the score was 2-0.
"We scored a perfectly good goal. Why the referee disallowed it...
"Certainly, decisions went totally against us."
He said: "The trouble was the balls whipped in from the corner and the player's blocked Allan McGregor - he couldn't get to it."
Focusing on the positives, Burley added: "We had a couple of (full) debuts: Christophe Berra, Ross McCormack. I thought, overall, they worked very hard."
Wednesday night's clash against Iceland is now vital to Scotland's hopes of qualifying from Group 9: "Now we've got to look forward to the home game against Iceland.
"Every game at international level is difficult; every game is so important, none more so than Wednesday evening.
"We've got three home games which we've certainly got to look to win, starting from Wednesday."