Portugal dominated the first half of their World Cup Group H match against Uruguay on Monday with nearly 70 percent of possession, but the South Americans came closest to scoring in a goalless halftime encounter.
Rodrigo Bentancur charged but his 32nd minute shot was blocked by keeper Diogo Costa.
Portugal, who would become the third team after France and Brazil to qualify for the last 16 with a win, lacked a final pass despite the presence of Cristiano Ronaldo, Joao Felix and Bruno Fernandes.