You have to take a good care your reliability. Your teammates will make the first impression of who you are.
It is a rating from your opponents according to how well you offer the dates, how well you respond to their offers, how you behave at the court, whether you come on time etc.
If you make a communication fault from time to time, but you apologize and fix the fault, you still do not have to get a bad evaluation. If your solidity percentage is a bit lower, the only way to improve it is to get a few 100% in the future.