Lovely photo! Really makes you warm inside. If I have any suggestion it would have been to have cropped the seats on the left side a bit and get the faces off-centre to the left and looking accross the photo to the right.
I love the expressions. You have captured pride. I think I might prefer this with a different crop, leaving less space on the left side of the image and more space in the direction they are looking.
This is really quite a great capture. The focal point appears to be on the seats on the BG rather than on the subjects themselves. This sot is evocative of memories of any parent whose child has played a team sport.
I like the backlighting and their expressions. I think I would have framed them to the left of the frame to get them off center and give more space where they are looking.