Answer:
Squeaky has never lost any race every since she was in kindergarden. Her reputation is of an invincible runner. To her, running is not a fun activity but a strong passion. She is always either running or training herself by doing something to improve further her athletic skills. But for this May Day race, she was shown to be a bit worried. We hear her trying to convince herself that Gretchen can’t defeat her. Gretchen says that this year she's going to win the May Day race by beating Squeaky. Gretchen has been gloating and treats squeaky badly just like a dog. For Squeaky this race is more personal and she wants to train hard and beat gretchen. Squeaky also wants to carry on her legacy of always winning the race.
Hope this helps :)