Well, first of all, try to give more descriptive titles to your threads, so that everyone can know what it's all about before reading a single post. This way, users that are looking for the same answers as you will came here more easily.
That said, it's actually impossible to answer your question. It depends on many factors, as your players, your lines, your staff, your tactics, and the individual tactics. Furthermore, it's your first pre-season game. Players aren't in shape yet. And maybe you tried a lot of prospects in this game while your opponent was running his team at full strength. Too many factors to be able to answer you actually
Could you give us more details? This way we should help you better
The only reason this thread didn't get locked is that nobody saw it before responses were made to it. Next time you won't be as lucky. Please follow the rules.
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Not very often, but it occurs sometimes. And you should worry to loose a pre-season game only if you're running your top-team against opponent's prospects! If you're running your prospects, like i usually do, no reason to worry 
