Daud was brought
down in front of the goal by Uruguay keeper Federico Elduayen.
Singapore then went close three more times as Uruguay wilted in the high humidity.
Uruguay laboured in front of goal and although coach Victor Pua tried to put on a brave face on the game, he conceded that his starting 11 was far from sorted.
He also admitted there may be a need to
squeeze in a further warm-up match.
"It was a good practice for the World Cup, but every game you
play raises new questions," he said.
"The physical state of each player is being looked at, and we
are trying out positions, switching players around to see the best
Pua denied speculation that Uruguay resented leaving their base camp in Japan to travel to Singapore for
a match against the world's 113th ranked side.