Rodriguez is playing to his strenghts, but his advantage is so small that he only needs one difficult moment and Contador can pass him. If Contador is serious about winning this race he should attack sooner when possible, Rodriguez biggest weakness are long efforts, you should break him before the final kilometer. But I'm not sure Contador is good enough for that now.
What a shame to see Gesink like this. The last two years he has shown a slight improvement in time trials, with the cost of becoming an above average climber.