I'm betting you lost the next match or you probably wouldn't be asking your question.
If you look at the pool world today, who's dominating the game? I would have to say, Shane.
Why is he dominating?
In his spare time, he's out there playing races to a hundred over three days usually against top players on the planet. So you can say, "I'm not as talented as he is and so can a lot of other people. But Shane doesn't win on talent alone. He's the most prepared player out there today and that makes a world of difference.
You showed you can beat a very good player but beating one of them doesn't get the job done. All you do at that point, if you lose your next match is doing the rest of the field, a favor.
Carry that win into your next match and the rest of them. It just might win you the event.
Get in physical and mental shape.
I personally won seven tournaments after losing my first match. All had more than thirty-two entries. One of them I won 11 matches in a row. I felt like a barber. All I kept saying to myself was, "Who's next?'
Of course at that point your also playing for your tournament life. I like that.
Good luck in the future. I hope this helps you and a lot of other players.