Let's not pull any punches: to win a Formula 1 drivers' world championship you must have that killer instinct. The true champions certainly don't hold back.
There are 19 other drivers out there, and to be top of the pile you need to score more points than any of them. And sometimes, to do that, drivers need to get their hands dirty.
As we have seen over the years, when a team puts together a line-up with two number-one drivers there will be fireworks.