The triathlon is a tough athletics event, including a long swim, a cycle ride and finishing with a gruelling run. It is an event in which brothers, Alistair and Jonny Brownlee from the UK excel, having won gold and silver at the last summer Olympic Games. Alistair, as always, beat his brother into second place. In some families, sporting rivalry can create friction and destroy relationships, but for the Brownlees, being brothers seems to have helped them push each other to the limits in order to become the very best. They appear to have a happy, healthy, competitive relationship. They live together, train together and compete against each other. For the moment, at least, they seem to accept that Alistair will always be the boss - even in the kitchen!
say that both siblings compete together against opponents
point out the superiority of one of the siblings
mention a negative aspect of sibling rivalry
refer to a decision made to protect siblings' personal relationship