Picture
There's no way to fix it unless you post the original screenshot.
Use a greenscreen shader, or a shader with a solid flat color. Don't use white, since tori's joints are white, and the magic wand will select the background as well as tori's joints.
Original
Utilize your free select tool to take your tori out of the white background (Magic Wand is incredibly unreliable except for non-shaded 2-D pictures.). Then paste it onto a transparent layer. Then you can add both the soccer ball and background by adding a transparent layer with your soccer ball and adding a background layer with your background. Good Luck and Keep Gimping