The task was to predict any goal scorer in the match, and he did. He predicted A. Sanchez and he scored. You predicted M. Rashford. He didn't score in the match. So, you lost.
The rules are clear and established by the sponsor. You don't read the rules, submit your prediction not according to the established format, and now claiming that the winners should be three. That's ridiculous! Read the rules here once again: https://steemit.com/contest/@reigns/contest-manchester-united-vs-tottenham-predict-and-win-3-steem.
And learn how to lose.