Great stuff from Alonso. He was the quicker Ferrari driver but Ferrari's "privilege system" means that the driver ahead on the track gets to pit first, so Alonso wouldn't be able to undercut Massa. He could see that overtaking Massa wasn't possible at this circuit. As a result, he backed off from Massa and maintained that gap - but crucially stayed out of Massa's dirty air and managed his tyres. When Massa pitted, Alonso used all his speed, drove flawlessly and got ahead of Massa. Very intelligent driving.
Because the double move was in place, they have to ignore it Also I doubt Michael would have made the same locking up mistake Rosberg did at the end of the straight, he is particularly better and defending.