The United States held tough against Belgium's pressure and went into halftime even at 0-0 in the second round of the World Cup.
U.S. goalkeeper Tim Howard made a tough save in the first minute to deny teenager Divock Origi as Belgium dominated possession for much of the first half.
Belgium midfielder Kevin De Bruyne stood out in the opening 45 minutes and saw a shot go wide in the 23rd minute.
Clint Dempsey had the best chance for the United States in the 21st minute, but Thibaut Courtois made a good save.
The game was delayed for about a minute when a fan ran onto the field in the 16th.