A bit plain on the right hand side, and perhaps blur the top right edge of the picture of the players to make it blend in with the black background like the bottom does.
You can see were the blue for the soccer render stops, you should make that fade to the black. If your making these in paint you should try photoshop for great banners.
i'd give you a 7/10 but i think the text should be a bit bigger and a different style if possible... also photoshop is so much easier to make banners with photosohp... also the top-right side was kinda dull, it was just all black, try putting some picture or something there.