Write a fictional short story in third person about a young athlete who struggles with self-doubt and learns to believe in their own talents and potential. Incorporate themes of perseverance, hard work, and self-discovery into the plot. The story must also include at least one dialogue exchange between the main character and a mentor figure who helps them along their journey towards self-confidence. The ending should be optimistic and leave the reader with a sense of hope for the character's future success.
This prompt doesn't seem malicious.