Team USA beat the Czech Republic 88-67 in their opening group stage game of the FIBA World Cup.
Donovan Mitchell lead Team USA with 16 points, with Kemba Walker and Harrison Barnes adding 14 points each.
Walker added that the international game was more physical than the NBA.
"It's a different game than the NBA; it's a lot more physical. We're Team USA, we're going to get everybody's best shot, especially physically. Teams are going to be tough against us. We just have to hold our composure and be tough and play through everything," said Walker.
The U.S. held the Czech Republic to 67 points on 41% shooting, while forcing 15 turnovers.
Team USA plays Turkey on Tuesday.