No offense but I'm gonna be nasty... as I usually am with commenting photos. It's waste of time doing any PS work in this photo. Photo is not sharp and that's it. No matter what you do with photo, it won't change photo being unsharp.
Now since I hate comments "this is great" or "this one suck", I rather give some advice what to change, that it won't suck next time. So my advice would be separated in two different ways how to do it. First you need to decide on what you want to focus. One option is your kid, other option is ball infront of him. Both options would work, while focusing on grass between ball and kid (like it's case now) doesn't work 
So go for focus on either of those two (ball or kid), open your aperture a bit more, so depth of field is smaller, and other thing (ball or kid) won't be so much in focus as it's at the moment. You will get much more interesting photo this way. If you go for focus on ball, try to get a bit lower, and next time a bit to left, so that orange training cone in background would get straight behind kid, and it would make background cleaner.
Next thing is cropping. This one is way to wide.Right side of photo is fine, but all other 3 sides are not. My way would be, and it would work for both previously stated options, to crop about 1cm bellow ball on bottom, just above kid's hand on top, and 1cm or maybe even a bit less on left side of kid. Bushes in background don't bring anything to photo, just as empty space on left (you can't really talk about negative space with this composition) doesn't.
So hopefully this few things will help at least a bit, even though my original comment was "just delete this photo" And once again... no offense for that one 
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