The Spurs lost 115-105 at the Rose Garden on Saturday night but Duncan does not believe that the defeat should cause too much concern.
"We're gonna win games and we're gonna lose games. It's just how it goes," the 14-time All-Star told reporters after the game.
"We're gonna use the entire 82 games to put a team together and have everybody on the same page once the playoffs start.
"We're gonna win some games and we're gonna lose some games and we're not going to freak out about it."
The Spurs face the Denver Nuggets on Tuesday night at the Pepsi Center.