Gasol had a shoulder injury if I'm not mistaken. He did warm up, this injury is not serious. He was given time to rest his injury and it was also a good opportunity for Spain to "hide" a part of their game obviously.
Notice that Ibaka didn't play much and was extremely good during his court time. Juanca "el pistolero" Navarro played like a rotting shrimp. Don't get it wrong, this guy rocks, it was just a bad night.
On the other hand, USA played their best line up. Also remember that they lost the first quarter when Spain was playing their not even best line up.
USA is in trouble!!!