When you lose a match do you BITCH and BLAME or GROW and BOND with your partner?? Every loss is an opportunity to contemplate and shift the next time. Losing is good for teaching!!! And when your partner sees the UNCONDITIONAL LOVE that you have for them by being kind EVEN if they didn't play their best that day - then she will WANT TO PLAY BETTER next time for you.
But if you come off the court and tell everyone that "she had an off day" and don't take responsibility for the loss too - then she won't want to play with you anymore.
Be sweet to your partner!!!