I see many parents wishing their children to be best. But they have to wish them to be at their best but not best of all.
How one will get to know their best?
By their performance but not by comparison of performances.
They have to be at their best. Being competitive is out of context here. You need to let them compete themselves. Once you start pushing them to be best of all, you forgot the basic lesson that all fingers in hand are not same.