Luis Leon Sanchez is out, So whatever lead-out his team might offer is reduced. Cav's going to have jump onto other lead outs if he's going to get that elusive win.
From Cycling news: "Although Sánchez was classified in last place on the stage, it immediately seemed unlikely that he would be able to continue in the Tour, and later in the evening his Astana-Qazaqstan team confirmed that he had broken his collarbone and would return home to Spain for an operation."