Mexico started the better side but were undone when Cristiano Ronaldo set up Ricardo Quaresma to break the deadlock, and it looked as though Javier Hernandez's header would not be enough for a point as Cedric Soares' deflected strike restored Portugal's advantage.
Portugal take on tournament hosts Russian Federation in their next group-stage outing on Wednesday afternoon, before then facing outsiders New Zealand three days later.
"I think that, when football people enjoy the way we play, especially against a team like the one we faced, it's very positive", he said.
Palestinians killed by Israeli police in Jerusalem
The Islamist movement Hamas that rules the Gaza Strip condemned the shooting of the Palestinians as a "crime by the occupation". Israeli authorities say most of the Palestinians killed were carrying out knife, gun or car-ramming attacks.
Portugal coach Fernando Santos said it was not the performance he expected from his team.
Mexico captain Andres Guardado towed the same line and was adamant that technology will be good for the game over the long run.
"If we apply it to perfection we have a very good chance of beating Portugal". We played without confidence, couldn't connect two or three passes. A report by a Portuguese newspaper two days before Sunday's game said that the Madrid forward had made the "irreversible" decision to leave the Spanish club because he was upset with the allegations. The team said that he couldn't go because he was receiving post-game treatment, although it said it wasn't anything serious.
An estimated 1.5 million people turned out to celebrate Warriors' NBA title
Curry hopped and shouted as he gave high-fives to the crowd after getting off a double-decker bus during the Thursday parade. Golden State won the series in five games and Green displayed a shirt that said "Quickie" with the Quicken Loans symbol.
Borussia Dortmund midfielder Raphael Guerreiro failed to deal with a cross into the box and Carlos Vela teed up Hernandez, who met the cross with a diving header. The image used was one of Ronaldo winking to his teammates when former Manchester United teammate Wayne Rooney was sent off in a game between Portugal and England at the 2006 World Cup.
The referee held up the game for the assistant to check the replay, before the goal was cancelled 40 seconds later, as Pepe had been adjudged to be offside.
Van crashes into London crowd causing numerous casualties, police say
Witnesses described seeing between eight to 10 people lying on the ground near to the Muslim Welfare House on Seven Sisters Road. One witness told The Telegraph that it appeared as though the driver of the van "lost control" of the vehicle "or something".
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