I'm not an 'editor', but as far as clarity is concerned your sentence is fine. It is not a sentence that can be used outside of an appropriate context, but the word 'one' in the sentence refrences back to the last noun, 'game', making the sentence clear. You are writing for an english-speaking audience, most of whom will know the meaning of the sentence and that 'one' refers to the number of games you are ahead.
I think the problem with adjusting a sentence like this is that you have to view it in context. If the sentence is isolated it is not clear on any level.
-Naiilo
PS- I think that my message is clear, but if it isn't I'm sure there is someone that can figure it out, right?