Scotland slipped a second friendly defeat of this international break, losing 1-0 to Ivory Coast in Liverpool.
Following Saturday's home defeat to Japan, Scotland offered more intent and endeavour with their performance but were found wanting in both boxes.
Like at Hampden Park, there were boos at half-time and full-time for Steve Clarke's men.
Clarke made nine changes, handing opportunities to some fringe players to make their mark in a 3-5-2 formation which allowed him to play two strikers in George Hirst and Che Adams.
However, former Arsenal man Nicolas Pepe bundled Ivory Coast in front on 12 minutes and Scotland couldn't find the required quality or inspiration to get on the scoresheet.
Scotland have two more warm-up games against Curacao and an as-yet-unnamed opponent before they take to the biggest stage of all for the first time in 28 years in the USA, where they face Haiti, Morocco and Brazil in their group.
More to follow...
Ivory Coast
Image: Nicolas Pepe scored Ivory Coast's winner
Robertson: Some really good signs
Scotland captain Andy Robertson speaking to BBC Scotland:
"Second half we really got to grips with where we needed to be off the ball and I thought we caused them problems.
"Obviously they were 1-0 up but we were the team pushing forward and trying to create.
"It's a friendly. We want to win these games, of course we do, but we're also trying stuff and you see that with the changes we made.
"A lot to learn but some really good signs, especially in the second half."
What next for Scotland?