Portugal was held to a surprise 1-1 draw by DR Congo in their opening World Cup match on Wednesday.
Cristiano Ronaldo, who matches Lionel Messi in a record sixth World Cup appearance, failed to score in the fixture. While three other superstars delivered for their countries on Tuesday, Ronaldo could not follow suit, missing the opportunity to become the first player to score in six different tournaments.
Portugal coach Roberto Martinez acknowledged that his side felt the pressure of trying to win the tournament.