Sanchez and Contador would be fools not to work together. Their interests are currently perfectly aligned and both are strong enough riders to contribute to an "alliance". That they are apparently friends and know each other well means that they might feel comfortable discussing plans in advance and trusting the other to do their part, but the core of their relationship over the last couple of stages is mutual self interest.
More generally, Contador sometimes gives the impression that he triumphs more through athletic brilliance than tactical brilliance, but one thing he is very smart about is building relationships in the peloton. Everyone knows that if you work with him, and help him achieve his goals, he will not screw you. If you work with him to pull away from his rivals on a climb, he will let you have the stage. He's even made a point of giving a stage to someone who worked for him in previous years.
Generosity may well be part of his personality (I don't know, having never met the guy), but either way this is also shrewd behaviour founded in having a sense of the bigger picture. Most of the time working with a stronger rider is a tactical mistake, but working with Contador is not.
Stephen Roche was famous for the number of strong alliances he had in the peloton and on quite a number of occasions had as much assistance from riders on rival teams as he had from his own team. I remember him saying something along the lines of it being a key rule to always repay favours. Contador seems to have a similar attitude.
More generally, Contador sometimes gives the impression that he triumphs more through athletic brilliance than tactical brilliance, but one thing he is very smart about is building relationships in the peloton. Everyone knows that if you work with him, and help him achieve his goals, he will not screw you. If you work with him to pull away from his rivals on a climb, he will let you have the stage. He's even made a point of giving a stage to someone who worked for him in previous years.
Generosity may well be part of his personality (I don't know, having never met the guy), but either way this is also shrewd behaviour founded in having a sense of the bigger picture. Most of the time working with a stronger rider is a tactical mistake, but working with Contador is not.
Stephen Roche was famous for the number of strong alliances he had in the peloton and on quite a number of occasions had as much assistance from riders on rival teams as he had from his own team. I remember him saying something along the lines of it being a key rule to always repay favours. Contador seems to have a similar attitude.