keep a calm head

I'm good at managing in the face of adversity, keeping a calm head.

Just to do what I shall tell you quietly, and to keep a calm head.'

Remember, rather, to keep a calm head, and to heed these words that have helped other wizards, in similar situations to your own, throughout the ages: in doubt, run.'

I'd go with jayawardena's world cup 100 as the best innings in ODIs, Dhoni's was superb given the pressure, but I think the way mahela accelerated at the end and kept a calm head while wickets fell at the other end made it the superior innings.