Nice work at stopping the action and getting the expressions on the faces. Only suggestion I might make is a little different crop, to see the top of the ball or showing more at the bottom so the feet weren't chopped at the ankles.
What game are they playing? The ball looks like a volleyball, but the players are in the same court area. You've certainly captured 'Stopped Motion' here. Not seeing any motion trails/blur anywhere. I do find the gal in the back left distracting as she's drawing my attention out of the main subject area (I like her pose and obvious involvement in the action). Good luck in the challenge.
Composition is pretty good, I do like the three subjects all fighting over the ball. I would have liked to see the whole basketball in the frame. The background subjects are hurting you here as it makes this shot seem really busy to me. Also the cut off feet take away from the action. You have very nice tonal range throughout the shot that is pleasing to the eye.
What I would have done different is shot at a lower f-stop to keep the focus on my foreground subjects and blurred out the background subjects, this would give more emphasis on your three main subjects. I give this a 6.